21120200013 has 16 divisors (see below), whose sum is σ = 30897873216. Its totient is φ = 12726128640.

The previous prime is 21120199999. The next prime is 21120200033. The reversal of 21120200013 is 31000202112.

It is not a de Polignac number, because 21120200013 - 2⁵ = 21120199981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21120200033) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1844020 + ... + 1855437.

It is an arithmetic number, because the mean of its divisors is an integer number (1931117076).

Almost surely, 2^21120200013 is an apocalyptic number.

It is an amenable number.

21120200013 is a deficient number, since it is larger than the sum of its proper divisors (9777673203).

21120200013 is a wasteful number, since it uses less digits than its factorization.

21120200013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3699644.

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 21120200013 its reverse (31000202112), we get a palindrome (52120402125).

The spelling of 21120200013 in words is "twenty-one billion, one hundred twenty million, two hundred thousand, thirteen".