21112302211 has 32 divisors (see below), whose sum is σ = 28408697856. Its totient is φ = 15152400000.

The previous prime is 21112302173. The next prime is 21112302283. The reversal of 21112302211 is 11220321112.

It is a cyclic number.

It is not a de Polignac number, because 21112302211 - 2²⁷ = 20978084483 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21112302311) 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, 438586 + ... + 484336.

It is an arithmetic number, because the mean of its divisors is an integer number (887771808).

Almost surely, 2^21112302211 is an apocalyptic number.

21112302211 is a deficient number, since it is larger than the sum of its proper divisors (7296395645).

21112302211 is a wasteful number, since it uses less digits than its factorization.

21112302211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46243.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 21112302211 its reverse (11220321112), we get a palindrome (32332623323).

It can be divided in two parts, 21112 and 302211, that added together give a palindrome (323323).

The spelling of 21112302211 in words is "twenty-one billion, one hundred twelve million, three hundred two thousand, two hundred eleven".