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1002112221 = 31130367037
BaseRepresentation
bin111011101110110…
…000010011011101
32120211122120112110
4323232300103131
54023020042341
6243234424233
733555545655
oct7356602335
92524576473
101002112221
11474736820
1223b732079
1312c7c9716
149713b365
155ce9c216
hex3bbb04dd

1002112221 has 8 divisors (see below), whose sum is σ = 1457617824. Its totient is φ = 607340720.

The previous prime is 1002112219. The next prime is 1002112253. The reversal of 1002112221 is 1222112001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1002112221 - 21 = 1002112219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1002112197 and 1002112206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002112211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15183486 + ... + 15183551.

It is an arithmetic number, because the mean of its divisors is an integer number (182202228).

Almost surely, 21002112221 is an apocalyptic number.

1002112221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1002112221 is a deficient number, since it is larger than the sum of its proper divisors (455505603).

1002112221 is a wasteful number, since it uses less digits than its factorization.

1002112221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30367051.

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 1002112221 is about 31656.1561311540. The cubic root of 1002112221 is about 1000.7035785278.

Adding to 1002112221 its reverse (1222112001), we get a palindrome (2224224222).

The spelling of 1002112221 in words is "one billion, two million, one hundred twelve thousand, two hundred twenty-one".

Divisors: 1 3 11 33 30367037 91101111 334037407 1002112221