13121015221200 has 60 divisors (see below), whose sum is σ = 42030985429088. Its totient is φ = 3498937392000.

The previous prime is 13121015221189. The next prime is 13121015221207. The reversal of 13121015221200 is 212251012131.

It is a tau number, because it is divible by the number of its divisors (60).

It is a super-2 number, since 2×13121015221200² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13121015221207) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5467088476 + ... + 5467090875.

Almost surely, 2^{13121015221200} is an apocalyptic number.

13121015221200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13121015221200 is an abundant number, since it is smaller than the sum of its proper divisors (28909970207888).

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

13121015221200 is a wasteful number, since it uses less digits than its factorization.

13121015221200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10934179372 (or 10934179361 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 21.

Adding to 13121015221200 its reverse (212251012131), we get a palindrome (13333266233331).

The spelling of 13121015221200 in words is "thirteen trillion, one hundred twenty-one billion, fifteen million, two hundred twenty-one thousand, two hundred".