20102021099965 has 32 divisors (see below), whose sum is σ = 28161385426944. Its totient is φ = 13487925364800.

The previous prime is 20102021099903. The next prime is 20102021100011. The reversal of 20102021099965 is 56999012020102.

It is not a de Polignac number, because 20102021099965 - 2³⁵ = 20067661361597 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5949162 + ... + 8694628.

It is an arithmetic number, because the mean of its divisors is an integer number (880043294592).

Almost surely, 2^{20102021099965} is an apocalyptic number.

It is an amenable number.

20102021099965 is a deficient number, since it is larger than the sum of its proper divisors (8059364326979).

20102021099965 is a wasteful number, since it uses less digits than its factorization.

20102021099965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2749977.

The product of its (nonzero) digits is 174960, while the sum is 46.

The spelling of 20102021099965 in words is "twenty trillion, one hundred two billion, twenty-one million, ninety-nine thousand, nine hundred sixty-five".