21112012021002 has 128 divisors (see below), whose sum is σ = 48835760160768. Its totient is φ = 5959977408000.

The previous prime is 21112012020997. The next prime is 21112012021031. The reversal of 21112012021002 is 20012021021112.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1349606193 + ... + 1349621835.

It is an arithmetic number, because the mean of its divisors is an integer number (381529376256).

Almost surely, 2^{21112012021002} is an apocalyptic number.

21112012021002 is an abundant number, since it is smaller than the sum of its proper divisors (27723748139766).

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

21112012021002 is a wasteful number, since it uses less digits than its factorization.

21112012021002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16804.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21112012021002 its reverse (20012021021112), we get a palindrome (41124033042114).

The spelling of 21112012021002 in words is "twenty-one trillion, one hundred twelve billion, twelve million, twenty-one thousand, two".