21031233121113 has 16 divisors (see below), whose sum is σ = 28726164442752. Its totient is φ = 13678575696000.

The previous prime is 21031233121109. The next prime is 21031233121117. The reversal of 21031233121113 is 31112133213012.

It is an interprime number because it is at equal distance from previous prime (21031233121109) and next prime (21031233121117).

It is not a de Polignac number, because 21031233121113 - 2² = 21031233121109 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21031233121117) 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, 4512468 + ... + 7900938.

It is an arithmetic number, because the mean of its divisors is an integer number (1795385277672).

Almost surely, 2^{21031233121113} is an apocalyptic number.

It is an amenable number.

21031233121113 is a deficient number, since it is larger than the sum of its proper divisors (7694931321639).

21031233121113 is a wasteful number, since it uses less digits than its factorization.

21031233121113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3438976.

The product of its (nonzero) digits is 648, while the sum is 24.

Adding to 21031233121113 its reverse (31112133213012), we get a palindrome (52143366334125).

The spelling of 21031233121113 in words is "twenty-one trillion, thirty-one billion, two hundred thirty-three million, one hundred twenty-one thousand, one hundred thirteen".