13021020312 has 16 divisors (see below), whose sum is σ = 32552550840. Its totient is φ = 4340340096.

The previous prime is 13021020251. The next prime is 13021020317. The reversal of 13021020312 is 21302012031.

It is a junction number, because it is equal to n+sod(n) for n = 13021020291 and 13021020300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13021020317) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 271271233 + ... + 271271280.

Almost surely, 2^13021020312 is an apocalyptic number.

13021020312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

13021020312 is an abundant number, since it is smaller than the sum of its proper divisors (19531530528).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13021020312 is a wasteful number, since it uses less digits than its factorization.

13021020312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 542542522 (or 542542518 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 13021020312 its reverse (21302012031), we get a palindrome (34323032343).

The spelling of 13021020312 in words is "thirteen billion, twenty-one million, twenty thousand, three hundred twelve".