21000011112012 has 24 divisors (see below), whose sum is σ = 49154600151216. Its totient is φ = 6977921672128.

The previous prime is 21000011112007. The next prime is 21000011112037. The reversal of 21000011112012 is 21021111000012.

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

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 7 ways as a sum of consecutive naturals, for example, 2760250023 + ... + 2760257630.

It is an arithmetic number, because the mean of its divisors is an integer number (2048108339634).

Almost surely, 2^{21000011112012} is an apocalyptic number.

It is an amenable number.

21000011112012 is an abundant number, since it is smaller than the sum of its proper divisors (28154589039204).

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

21000011112012 is a wasteful number, since it uses less digits than its factorization.

21000011112012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5520507977 (or 5520507975 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 21000011112012 its reverse (21021111000012), we get a palindrome (42021122112024).

The spelling of 21000011112012 in words is "twenty-one trillion, eleven million, one hundred twelve thousand, twelve".