10504016921 has 2 divisors, whose sum is σ = 10504016922. Its totient is φ = 10504016920.

The previous prime is 10504016911. The next prime is 10504016927. The reversal of 10504016921 is 12961040501.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9643240000 + 860776921 = 98200^2 + 29339^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10504016921 is a prime.

It is a super-2 number, since 2×10504016921² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (10504016927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5252008460 + 5252008461.

It is an arithmetic number, because the mean of its divisors is an integer number (5252008461).

Almost surely, 2^10504016921 is an apocalyptic number.

It is an amenable number.

10504016921 is a deficient number, since it is larger than the sum of its proper divisors (1).

10504016921 is an equidigital number, since it uses as much as digits as its factorization.

10504016921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 29.

The spelling of 10504016921 in words is "ten billion, five hundred four million, sixteen thousand, nine hundred twenty-one".