21102023211 has 16 divisors (see below), whose sum is σ = 29795251104. Its totient is φ = 13238636544.

The previous prime is 21102023179. The next prime is 21102023221. The reversal of 21102023211 is 11232020112.

It is not a de Polignac number, because 21102023211 - 2⁵ = 21102023179 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21102023221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 402531 + ... + 451923.

It is an arithmetic number, because the mean of its divisors is an integer number (1862203194).

Almost surely, 2^21102023211 is an apocalyptic number.

21102023211 is a deficient number, since it is larger than the sum of its proper divisors (8693227893).

21102023211 is a wasteful number, since it uses less digits than its factorization.

21102023211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57790.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 21102023211 its reverse (11232020112), we get a palindrome (32334043323).

The spelling of 21102023211 in words is "twenty-one billion, one hundred two million, twenty-three thousand, two hundred eleven".