10010561021 has 2 divisors, whose sum is σ = 10010561022. Its totient is φ = 10010561020.

The previous prime is 10010561003. The next prime is 10010561047. The reversal of 10010561021 is 12016501001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7273701796 + 2736859225 = 85286^2 + 52315^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10010561021 is a prime.

It is a super-2 number, since 2×10010561021² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10010561051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5005280510 + 5005280511.

It is an arithmetic number, because the mean of its divisors is an integer number (5005280511).

Almost surely, 2^10010561021 is an apocalyptic number.

It is an amenable number.

10010561021 is a deficient number, since it is larger than the sum of its proper divisors (1).

10010561021 is an equidigital number, since it uses as much as digits as its factorization.

10010561021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60, while the sum is 17.

The spelling of 10010561021 in words is "ten billion, ten million, five hundred sixty-one thousand, twenty-one".