10521212665 has 16 divisors (see below), whose sum is σ = 13296024000. Its totient is φ = 7970329152.

The previous prime is 10521212659. The next prime is 10521212677. The reversal of 10521212665 is 56621212501.

It is not a de Polignac number, because 10521212665 - 2¹¹ = 10521210617 is a prime.

It is a super-2 number, since 2×10521212665² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 193686 + ... + 241984.

It is an arithmetic number, because the mean of its divisors is an integer number (831001500).

Almost surely, 2^10521212665 is an apocalyptic number.

It is an amenable number.

10521212665 is a deficient number, since it is larger than the sum of its proper divisors (2774811335).

10521212665 is a wasteful number, since it uses less digits than its factorization.

10521212665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50616.

The product of its (nonzero) digits is 7200, while the sum is 31.

The spelling of 10521212665 in words is "ten billion, five hundred twenty-one million, two hundred twelve thousand, six hundred sixty-five".