13121014440 has 64 divisors (see below), whose sum is σ = 40200572160. Its totient is φ = 3424490240.

The previous prime is 13121014429. The next prime is 13121014441. The reversal of 13121014440 is 4441012131.

It is a super-2 number, since 2×13121014440² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13121014441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1157571 + ... + 1168850.

It is an arithmetic number, because the mean of its divisors is an integer number (628133940).

Almost surely, 2^13121014440 is an apocalyptic number.

13121014440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13121014440 is an abundant number, since it is smaller than the sum of its proper divisors (27079557720).

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

13121014440 is a wasteful number, since it uses less digits than its factorization.

13121014440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2326482 (or 2326478 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 13121014440 its reverse (4441012131), we get a palindrome (17562026571).

The spelling of 13121014440 in words is "thirteen billion, one hundred twenty-one million, fourteen thousand, four hundred forty".