21031222220113 has 12 divisors (see below), whose sum is σ = 24466190857920. Its totient is φ = 18025804226472.

The previous prime is 21031222220087. The next prime is 21031222220147. The reversal of 21031222220113 is 31102222213012.

It is not a de Polignac number, because 21031222220113 - 2²¹ = 21031220122961 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21031222220153) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10468381 + ... + 12314602.

It is an arithmetic number, because the mean of its divisors is an integer number (2038849238160).

Almost surely, 2^{21031222220113} is an apocalyptic number.

It is an amenable number.

21031222220113 is a deficient number, since it is larger than the sum of its proper divisors (3434968637807).

21031222220113 is a wasteful number, since it uses less digits than its factorization.

21031222220113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22801836 (or 22801829 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 21031222220113 its reverse (31102222213012), we get a palindrome (52133444433125).

The spelling of 21031222220113 in words is "twenty-one trillion, thirty-one billion, two hundred twenty-two million, two hundred twenty thousand, one hundred thirteen".