13021213021 has 8 divisors (see below), whose sum is σ = 13232977344. Its totient is φ = 12809961120.

The previous prime is 13021212991. The next prime is 13021213039. The reversal of 13021213021 is 12031212031.

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 13021213021 - 2⁵ = 13021212989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13021212986 and 13021213004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13021213081) 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, 76705 + ... + 178678.

It is an arithmetic number, because the mean of its divisors is an integer number (1654122168).

Almost surely, 2^13021213021 is an apocalyptic number.

It is an amenable number.

13021213021 is a deficient number, since it is larger than the sum of its proper divisors (211764323).

13021213021 is an equidigital number, since it uses as much as digits as its factorization.

13021213021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256211.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 13021213021 its reverse (12031212031), we get a palindrome (25052425052).

The spelling of 13021213021 in words is "thirteen billion, twenty-one million, two hundred thirteen thousand, twenty-one".