21132221211 has 12 divisors (see below), whose sum is σ = 32130862920. Its totient is φ = 13346665920.

The previous prime is 21132221183. The next prime is 21132221269. The reversal of 21132221211 is 11212223112.

It is not a de Polignac number, because 21132221211 - 2⁵ = 21132221179 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21132221281) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 61789950 + ... + 61790291.

It is an arithmetic number, because the mean of its divisors is an integer number (2677571910).

Almost surely, 2^21132221211 is an apocalyptic number.

21132221211 is a deficient number, since it is larger than the sum of its proper divisors (10998641709).

21132221211 is a wasteful number, since it uses less digits than its factorization.

21132221211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123580266 (or 123580263 counting only the distinct ones).

The product of its digits is 96, while the sum is 18.

Adding to 21132221211 its reverse (11212223112), we get a palindrome (32344444323).

The spelling of 21132221211 in words is "twenty-one billion, one hundred thirty-two million, two hundred twenty-one thousand, two hundred eleven".