21222231232012 has 12 divisors (see below), whose sum is σ = 37149099275176. Its totient is φ = 10608202867680.

The previous prime is 21222231231979. The next prime is 21222231232021. The reversal of 21222231232012 is 21023213222212.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 728170689 + ... + 728199832.

Almost surely, 2^{21222231232012} is an apocalyptic number.

It is an amenable number.

21222231232012 is a deficient number, since it is larger than the sum of its proper divisors (15926868043164).

21222231232012 is a wasteful number, since it uses less digits than its factorization.

21222231232012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1456374168 (or 1456374166 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 21222231232012 its reverse (21023213222212), we get a palindrome (42245444454224).

The spelling of 21222231232012 in words is "twenty-one trillion, two hundred twenty-two billion, two hundred thirty-one million, two hundred thirty-two thousand, twelve".