13121162420 has 12 divisors (see below), whose sum is σ = 27554441124. Its totient is φ = 5248464960.

The previous prime is 13121162413. The next prime is 13121162437. The reversal of 13121162420 is 2426112131.

It can be written as a sum of positive squares in 2 ways, for example, as 2640726544 + 10480435876 = 51388^2 + 102374^2 .

It is a super-3 number, since 3×13121162420³ (a number of 31 digits) contains 333 as substring.

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, 328029041 + ... + 328029080.

It is an arithmetic number, because the mean of its divisors is an integer number (2296203427).

Almost surely, 2^13121162420 is an apocalyptic number.

13121162420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13121162420 is an abundant number, since it is smaller than the sum of its proper divisors (14433278704).

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

13121162420 is a wasteful number, since it uses less digits than its factorization.

13121162420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 656058130 (or 656058128 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 13121162420 its reverse (2426112131), we get a palindrome (15547274551).

The spelling of 13121162420 in words is "thirteen billion, one hundred twenty-one million, one hundred sixty-two thousand, four hundred twenty".