10202012981 has 2 divisors, whose sum is σ = 10202012982. Its totient is φ = 10202012980.

The previous prime is 10202012959. The next prime is 10202013109. The reversal of 10202012981 is 18921020201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7092166225 + 3109846756 = 84215^2 + 55766^2 .

It is a cyclic number.

It is not a de Polignac number, because 10202012981 - 2³⁰ = 9128271157 is a prime.

It is a super-2 number, since 2×10202012981² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 10202012981.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10202012881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5101006490 + 5101006491.

It is an arithmetic number, because the mean of its divisors is an integer number (5101006491).

Almost surely, 2^10202012981 is an apocalyptic number.

It is an amenable number.

10202012981 is a deficient number, since it is larger than the sum of its proper divisors (1).

10202012981 is an equidigital number, since it uses as much as digits as its factorization.

10202012981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 26.

The spelling of 10202012981 in words is "ten billion, two hundred two million, twelve thousand, nine hundred eighty-one".