21211112010111 has 32 divisors (see below), whose sum is σ = 30916047052800. Its totient is φ = 12877538941440.

The previous prime is 21211112010083. The next prime is 21211112010113. The reversal of 21211112010111 is 11101021111212.

It is not a de Polignac number, because 21211112010111 - 2¹⁸ = 21211111747967 is a prime.

It is a super-2 number, since 2×21211112010111² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21211112010113) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8771130 + ... + 10924968.

It is an arithmetic number, because the mean of its divisors is an integer number (966126470400).

Almost surely, 2^{21211112010111} is an apocalyptic number.

21211112010111 is a deficient number, since it is larger than the sum of its proper divisors (9704935042689).

21211112010111 is a wasteful number, since it uses less digits than its factorization.

21211112010111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2160119.

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 21211112010111 its reverse (11101021111212), we get a palindrome (32312133121323).

The spelling of 21211112010111 in words is "twenty-one trillion, two hundred eleven billion, one hundred twelve million, ten thousand, one hundred eleven".