21112232012 has 24 divisors (see below), whose sum is σ = 37045947456. Its totient is φ = 10527712208.

The previous prime is 21112231999. The next prime is 21112232023. The reversal of 21112232012 is 21023221112.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2885663 + ... + 2892969.

It is an arithmetic number, because the mean of its divisors is an integer number (1543581144).

Almost surely, 2^21112232012 is an apocalyptic number.

It is an amenable number.

21112232012 is a deficient number, since it is larger than the sum of its proper divisors (15933715444).

21112232012 is a wasteful number, since it uses less digits than its factorization.

21112232012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9157 (or 9155 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 21112232012 its reverse (21023221112), we get a palindrome (42135453124).

The spelling of 21112232012 in words is "twenty-one billion, one hundred twelve million, two hundred thirty-two thousand, twelve".