121012321313 has 4 divisors (see below), whose sum is σ = 130320961428. Its totient is φ = 111703681200.

The previous prime is 121012321307. The next prime is 121012321319. The reversal of 121012321313 is 313123210121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 313123210121 = 319289 ⋅980689.

It is an interprime number because it is at equal distance from previous prime (121012321307) and next prime (121012321319).

It can be written as a sum of positive squares in 2 ways, for example, as 39454671424 + 81557649889 = 198632^2 + 285583^2 .

It is a cyclic number.

It is not a de Polignac number, because 121012321313 - 2⁸ = 121012321057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121012321319) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4654320038 + ... + 4654320063.

It is an arithmetic number, because the mean of its divisors is an integer number (32580240357).

Almost surely, 2^121012321313 is an apocalyptic number.

121012321313 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

121012321313 is a deficient number, since it is larger than the sum of its proper divisors (9308640115).

121012321313 is an equidigital number, since it uses as much as digits as its factorization.

121012321313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9308640114.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 121012321313 its reverse (313123210121), we get a palindrome (434135531434).

The spelling of 121012321313 in words is "one hundred twenty-one billion, twelve million, three hundred twenty-one thousand, three hundred thirteen".