1312120133121 has 8 divisors (see below), whose sum is σ = 1999421155264. Its totient is φ = 749782933200.

The previous prime is 1312120133101. The next prime is 1312120133123. The reversal of 1312120133121 is 1213310212131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1312120133121 - 2¹⁵ = 1312120100353 is a prime.

It is a super-2 number, since 2×1312120133121² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 62481911101 = 1312120133121 / (1 + 3 + 1 + 2 + 1 + 2 + 0 + 1 + 3 + 3 + 1 + 2 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1312120133123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31240955530 + ... + 31240955571.

It is an arithmetic number, because the mean of its divisors is an integer number (249927644408).

Almost surely, 2^{1312120133121} is an apocalyptic number.

It is an amenable number.

1312120133121 is a deficient number, since it is larger than the sum of its proper divisors (687301022143).

1312120133121 is an equidigital number, since it uses as much as digits as its factorization.

1312120133121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62481911111.

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 1312120133121 its reverse (1213310212131), we get a palindrome (2525430345252).

The spelling of 1312120133121 in words is "one trillion, three hundred twelve billion, one hundred twenty million, one hundred thirty-three thousand, one hundred twenty-one".