10545977021 has 4 divisors (see below), whose sum is σ = 10609126752. Its totient is φ = 10482827292.

The previous prime is 10545976937. The next prime is 10545977027. The reversal of 10545977021 is 12077954501.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12077954501 = 139 ⋅86891759.

It is a cyclic number.

It is not a de Polignac number, because 10545977021 - 2¹⁰ = 10545975997 is a prime.

It is a super-2 number, since 2×10545977021² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 10545977021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10545977027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31574615 + ... + 31574948.

It is an arithmetic number, because the mean of its divisors is an integer number (2652281688).

Almost surely, 2^10545977021 is an apocalyptic number.

It is an amenable number.

10545977021 is a deficient number, since it is larger than the sum of its proper divisors (63149731).

10545977021 is an equidigital number, since it uses as much as digits as its factorization.

10545977021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63149730.

The product of its (nonzero) digits is 88200, while the sum is 41.

The spelling of 10545977021 in words is "ten billion, five hundred forty-five million, nine hundred seventy-seven thousand, twenty-one".