12013121020 has 12 divisors (see below), whose sum is σ = 25227554184. Its totient is φ = 4805248400.

The previous prime is 12013120981. The next prime is 12013121041. The reversal of 12013121020 is 2012131021.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 300328006 + ... + 300328045.

It is an arithmetic number, because the mean of its divisors is an integer number (2102296182).

Almost surely, 2^12013121020 is an apocalyptic number.

12013121020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12013121020 is an abundant number, since it is smaller than the sum of its proper divisors (13214433164).

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

12013121020 is a wasteful number, since it uses less digits than its factorization.

12013121020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 600656060 (or 600656058 counting only the distinct ones).

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

Adding to 12013121020 its reverse (2012131021), we get a palindrome (14025252041).

The spelling of 12013121020 in words is "twelve billion, thirteen million, one hundred twenty-one thousand, twenty".