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1022212981 is a prime number
BaseRepresentation
bin111100111011011…
…011101101110101
32122020110210121001
4330323123231311
54043141303411
6245233323301
734221444526
oct7473335565
92566423531
101022212981
11485015819
12246406531
13133a1696a
1499a9084d
155eb1cdc1
hex3cedbb75

1022212981 has 2 divisors, whose sum is σ = 1022212982. Its totient is φ = 1022212980.

The previous prime is 1022212963. The next prime is 1022213039. The reversal of 1022212981 is 1892122201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 887444100 + 134768881 = 29790^2 + 11609^2 .

It is a cyclic number.

It is not a de Polignac number, because 1022212981 - 211 = 1022210933 is a prime.

It is a super-2 number, since 2×10222129812 = 2089838757049812722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1022213981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 511106490 + 511106491.

It is an arithmetic number, because the mean of its divisors is an integer number (511106491).

Almost surely, 21022212981 is an apocalyptic number.

It is an amenable number.

1022212981 is a deficient number, since it is larger than the sum of its proper divisors (1).

1022212981 is an equidigital number, since it uses as much as digits as its factorization.

1022212981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 28.

The square root of 1022212981 is about 31972.0656354887. The cubic root of 1022212981 is about 1007.3501696419.

The spelling of 1022212981 in words is "one billion, twenty-two million, two hundred twelve thousand, nine hundred eighty-one".