13121203323312 has 160 divisors (see below), whose sum is σ = 43045579906560. Its totient is φ = 3748699319040.

The previous prime is 13121203323289. The next prime is 13121203323313. The reversal of 13121203323312 is 21332330212131.

13121203323312 is a `hidden beast` number, since 1 + 3 + 1 + 2 + 1 + 20 + 3 + 323 + 312 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (13121203323313) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 56653987 + ... + 56885117.

It is an arithmetic number, because the mean of its divisors is an integer number (269034874416).

Almost surely, 2^{13121203323312} is an apocalyptic number.

13121203323312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

13121203323312 is an abundant number, since it is smaller than the sum of its proper divisors (29924376583248).

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

13121203323312 is a wasteful number, since it uses less digits than its factorization.

13121203323312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249928 (or 249916 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 27.

Adding to 13121203323312 its reverse (21332330212131), we get a palindrome (34453533535443).

The spelling of 13121203323312 in words is "thirteen trillion, one hundred twenty-one billion, two hundred three million, three hundred twenty-three thousand, three hundred twelve".