10021115655655 has 32 divisors (see below), whose sum is σ = 12981460681728. Its totient is φ = 7382453145600.

The previous prime is 10021115655623. The next prime is 10021115655701. The reversal of 10021115655655 is 55655651112001.

It is not a de Polignac number, because 10021115655655 - 2⁵ = 10021115655623 is a prime.

It is a Duffinian number.

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, 71418927 + ... + 71559103.

It is an arithmetic number, because the mean of its divisors is an integer number (405670646304).

Almost surely, 2^{10021115655655} is an apocalyptic number.

10021115655655 is a deficient number, since it is larger than the sum of its proper divisors (2960345026073).

10021115655655 is a wasteful number, since it uses less digits than its factorization.

10021115655655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142827.

The product of its (nonzero) digits is 225000, while the sum is 43.

Adding to 10021115655655 its reverse (55655651112001), we get a palindrome (65676766767656).

The spelling of 10021115655655 in words is "ten trillion, twenty-one billion, one hundred fifteen million, six hundred fifty-five thousand, six hundred fifty-five".