21000000112012 has 48 divisors (see below), whose sum is σ = 40675426283520. Its totient is φ = 9442509523200.

The previous prime is 21000000112009. The next prime is 21000000112037. The reversal of 21000000112012 is 21021100000012.

It is a self number, because there is not a number n which added to its sum of digits gives 21000000112012.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62884414 + ... + 63217477.

It is an arithmetic number, because the mean of its divisors is an integer number (847404714240).

Almost surely, 2^{21000000112012} is an apocalyptic number.

It is an amenable number.

21000000112012 is a deficient number, since it is larger than the sum of its proper divisors (19675426171508).

21000000112012 is a wasteful number, since it uses less digits than its factorization.

21000000112012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126102022 (or 126102020 counting only the distinct ones).

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

Adding to 21000000112012 its reverse (21021100000012), we get a palindrome (42021100112024).

The spelling of 21000000112012 in words is "twenty-one trillion, one hundred twelve thousand, twelve".