21120212201313 has 16 divisors (see below), whose sum is σ = 28212235275200. Its totient is φ = 14054179423680.

The previous prime is 21120212201267. The next prime is 21120212201357. The reversal of 21120212201313 is 31310221202112.

It is not a de Polignac number, because 21120212201313 - 2²² = 21120208007009 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21120212201313.

It is not an unprimeable number, because it can be changed into a prime (21120212203313) 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, 4222743 + ... + 7750611.

It is an arithmetic number, because the mean of its divisors is an integer number (1763264704700).

Almost surely, 2^{21120212201313} is an apocalyptic number.

It is an amenable number.

21120212201313 is a deficient number, since it is larger than the sum of its proper divisors (7092023073887).

21120212201313 is a wasteful number, since it uses less digits than its factorization.

21120212201313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3531552.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 21120212201313 its reverse (31310221202112), we get a palindrome (52430433403425).

The spelling of 21120212201313 in words is "twenty-one trillion, one hundred twenty billion, two hundred twelve million, two hundred one thousand, three hundred thirteen".