21100011111012 has 48 divisors (see below), whose sum is σ = 50291923472000. Its totient is φ = 6883272380160.

The previous prime is 21100011110993. The next prime is 21100011111059. The reversal of 21100011111012 is 21011111000112.

It is a Harshad number since it is a multiple of its sum of digits (12).

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, 72279337 + ... + 72570672.

Almost surely, 2^{21100011111012} is an apocalyptic number.

It is an amenable number.

21100011111012 is an abundant number, since it is smaller than the sum of its proper divisors (29191912360988).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21100011111012 is a wasteful number, since it uses less digits than its factorization.

21100011111012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144850276 (or 144850274 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 21100011111012 its reverse (21011111000112), we get a palindrome (42111122111124).

The spelling of 21100011111012 in words is "twenty-one trillion, one hundred billion, eleven million, one hundred eleven thousand, twelve".