21111220002010 has 64 divisors (see below), whose sum is σ = 38843542483200. Its totient is φ = 8259775921152.

The previous prime is 21111220001953. The next prime is 21111220002083. The reversal of 21111220002010 is 1020002211112.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25828276 + ... + 26633104.

It is an arithmetic number, because the mean of its divisors is an integer number (606930351300).

Almost surely, 2^{21111220002010} is an apocalyptic number.

21111220002010 is a deficient number, since it is larger than the sum of its proper divisors (17732322481190).

21111220002010 is a wasteful number, since it uses less digits than its factorization.

21111220002010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 805255.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21111220002010 its reverse (1020002211112), we get a palindrome (22131222213122).

The spelling of 21111220002010 in words is "twenty-one trillion, one hundred eleven billion, two hundred twenty million, two thousand, ten".