12121313020 has 12 divisors (see below), whose sum is σ = 25454757384. Its totient is φ = 4848525200.

The previous prime is 12121313003. The next prime is 12121313027. The reversal of 12121313020 is 2031312121.

It is a junction number, because it is equal to n+sod(n) for n = 12121312985 and 12121313003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12121313027) 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, 303032806 + ... + 303032845.

It is an arithmetic number, because the mean of its divisors is an integer number (2121229782).

Almost surely, 2^12121313020 is an apocalyptic number.

12121313020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12121313020 is an abundant number, since it is smaller than the sum of its proper divisors (13333444364).

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

12121313020 is a wasteful number, since it uses less digits than its factorization.

12121313020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 606065660 (or 606065658 counting only the distinct ones).

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

Adding to 12121313020 its reverse (2031312121), we get a palindrome (14152625141).

The spelling of 12121313020 in words is "twelve billion, one hundred twenty-one million, three hundred thirteen thousand, twenty".