13012121020 has 48 divisors (see below), whose sum is σ = 27500004000. Its totient is φ = 5171685120.

The previous prime is 13012120991. The next prime is 13012121051. The reversal of 13012121020 is 2012121031.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2989806 + ... + 2994154.

It is an arithmetic number, because the mean of its divisors is an integer number (572916750).

Almost surely, 2^13012121020 is an apocalyptic number.

13012121020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13012121020 is an abundant number, since it is smaller than the sum of its proper divisors (14487882980).

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

13012121020 is a wasteful number, since it uses less digits than its factorization.

13012121020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5278 (or 5276 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 13012121020 its reverse (2012121031), we get a palindrome (15024242051).

The spelling of 13012121020 in words is "thirteen billion, twelve million, one hundred twenty-one thousand, twenty".