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1020312111 = 371337831217
BaseRepresentation
bin111100110100001…
…011101000101111
32122002220020002110
4330310023220233
54042144441421
6245124455103
734166336610
oct7464135057
92562806073
101020312111
11483a37655
1224584a493
131334cc6a0
1499717c07
155e894a76
hex3cd0ba2f

1020312111 has 64 divisors (see below), whose sum is σ = 1741759488. Its totient is φ = 516907008.

The previous prime is 1020312091. The next prime is 1020312149. The reversal of 1020312111 is 1112130201.

It is not a de Polignac number, because 1020312111 - 217 = 1020181039 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020312151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 837775 + ... + 838991.

It is an arithmetic number, because the mean of its divisors is an integer number (27214992).

Almost surely, 21020312111 is an apocalyptic number.

1020312111 is a deficient number, since it is larger than the sum of its proper divisors (721447377).

1020312111 is a wasteful number, since it uses less digits than its factorization.

1020312111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1360.

The product of its (nonzero) digits is 12, while the sum is 12.

The square root of 1020312111 is about 31942.3247588525. The cubic root of 1020312111 is about 1006.7253716453.

Adding to 1020312111 its reverse (1112130201), we get a palindrome (2132442312).

The spelling of 1020312111 in words is "one billion, twenty million, three hundred twelve thousand, one hundred eleven".

Divisors: 1 3 7 13 21 37 39 83 91 111 249 259 273 481 581 777 1079 1217 1443 1743 3071 3237 3367 3651 7553 8519 9213 10101 15821 21497 22659 25557 39923 45029 47463 64491 101011 110747 119769 135087 279461 303033 315203 332241 585377 707077 838383 945609 1313143 1756131 2121231 3737407 3939429 4097639 9192001 11212221 12292917 26161849 27576003 48586291 78485547 145758873 340104037 1020312111