12013011321021 has 40 divisors (see below), whose sum is σ = 18093849928704. Its totient is φ = 7942457255040.

The previous prime is 12013011321001. The next prime is 12013011321061. The reversal of 12013011321021 is 12012311031021.

12013011321021 is a `hidden beast` number, since 1 + 20 + 1 + 301 + 1 + 321 + 0 + 21 = 666.

It is not a de Polignac number, because 12013011321021 - 2⁴² = 7614964809917 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12013011320985 and 12013011321003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12013011321001) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 25805701 + ... + 26267093.

Almost surely, 2^{12013011321021} is an apocalyptic number.

It is an amenable number.

12013011321021 is a deficient number, since it is larger than the sum of its proper divisors (6080838607683).

12013011321021 is a wasteful number, since it uses less digits than its factorization.

12013011321021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 464063 (or 464054 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 12013011321021 its reverse (12012311031021), we get a palindrome (24025322352042).

The spelling of 12013011321021 in words is "twelve trillion, thirteen billion, eleven million, three hundred twenty-one thousand, twenty-one".