10620109621 has 6 divisors (see below), whose sum is σ = 11673343766. Its totient is φ = 9654645000.

The previous prime is 10620109607. The next prime is 10620109693. The reversal of 10620109621 is 12690102601.

It can be written as a sum of positive squares in only one way, i.e., 8116208100 + 2503901521 = 90090^2 + 50039^2 .

It is not a de Polignac number, because 10620109621 - 2⁵ = 10620109589 is a prime.

It is a super-2 number, since 2×10620109621² (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 10620109621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10620109601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 43884630 + ... + 43884871.

Almost surely, 2^10620109621 is an apocalyptic number.

10620109621 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

10620109621 is a deficient number, since it is larger than the sum of its proper divisors (1053234145).

10620109621 is an equidigital number, since it uses as much as digits as its factorization.

10620109621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87769523 (or 87769512 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 28.

The spelling of 10620109621 in words is "ten billion, six hundred twenty million, one hundred nine thousand, six hundred twenty-one".