21112022211 has 32 divisors (see below), whose sum is σ = 33077323776. Its totient is φ = 11726208000.

The previous prime is 21112022201. The next prime is 21112022221. The reversal of 21112022211 is 11222021112.

It is an interprime number because it is at equal distance from previous prime (21112022201) and next prime (21112022221).

It is not a de Polignac number, because 21112022211 - 2²² = 21107827907 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21112022201) 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, 188091 + ... + 278571.

It is an arithmetic number, because the mean of its divisors is an integer number (1033666368).

Almost surely, 2^21112022211 is an apocalyptic number.

21112022211 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

21112022211 is a deficient number, since it is larger than the sum of its proper divisors (11965301565).

21112022211 is a wasteful number, since it uses less digits than its factorization.

21112022211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90803.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21112022211 its reverse (11222021112), we get a palindrome (32334043323).

The spelling of 21112022211 in words is "twenty-one billion, one hundred twelve million, twenty-two thousand, two hundred eleven".