13112231021 has 8 divisors (see below), whose sum is σ = 13310328864. Its totient is φ = 12915088560.

The previous prime is 13112231009. The next prime is 13112231089. The reversal of 13112231021 is 12013221131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13112231021 - 2¹⁴ = 13112214637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13112231521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 211166 + ... + 266111.

It is an arithmetic number, because the mean of its divisors is an integer number (1663791108).

Almost surely, 2^13112231021 is an apocalyptic number.

It is an amenable number.

13112231021 is a deficient number, since it is larger than the sum of its proper divisors (198097843).

13112231021 is an equidigital number, since it uses as much as digits as its factorization.

13112231021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 477691.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 13112231021 its reverse (12013221131), we get a palindrome (25125452152).

The spelling of 13112231021 in words is "thirteen billion, one hundred twelve million, two hundred thirty-one thousand, twenty-one".