13121020320002 has 24 divisors (see below), whose sum is σ = 24241596968844. Its totient is φ = 5292512397312.

The previous prime is 13121020319989. The next prime is 13121020320101. The reversal of 13121020320002 is 20002302012131.

It can be written as a sum of positive squares in 2 ways, for example, as 11899595277241 + 1221425042761 = 3449579^2 + 1105181^2 .

It is a super-2 number, since 2×13121020320002² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3937879583 + ... + 3937882914.

Almost surely, 2^{13121020320002} is an apocalyptic number.

13121020320002 is a deficient number, since it is larger than the sum of its proper divisors (11120576648842).

13121020320002 is a wasteful number, since it uses less digits than its factorization.

13121020320002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7875762530 (or 7875762523 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 13121020320002 its reverse (20002302012131), we get a palindrome (33123322332133).

The spelling of 13121020320002 in words is "thirteen trillion, one hundred twenty-one billion, twenty million, three hundred twenty thousand, two".