21112000012 has 24 divisors (see below), whose sum is σ = 38564872416. Its totient is φ = 10093763328.

The previous prime is 21111999947. The next prime is 21112000097. The reversal of 21112000012 is 21000021112.

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, 260298 + ... + 331630.

It is an arithmetic number, because the mean of its divisors is an integer number (1606869684).

Almost surely, 2^21112000012 is an apocalyptic number.

It is an amenable number.

21112000012 is a deficient number, since it is larger than the sum of its proper divisors (17452872404).

21112000012 is a wasteful number, since it uses less digits than its factorization.

21112000012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74577 (or 74575 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 21112000012 its reverse (21000021112), we get a palindrome (42112021124).

The spelling of 21112000012 in words is "twenty-one billion, one hundred twelve million, twelve", and thus it is an aban number.