1310120121 has 16 divisors (see below), whose sum is σ = 1787206400. Its totient is φ = 853452288.

The previous prime is 1310120111. The next prime is 1310120137. The reversal of 1310120121 is 1210210131.

It is not a de Polignac number, because 1310120121 - 2⁹ = 1310119609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1310120097 and 1310120106.

It is not an unprimeable number, because it can be changed into a prime (1310120111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5506 + ... + 51483.

It is an arithmetic number, because the mean of its divisors is an integer number (111700400).

Almost surely, 2^1310120121 is an apocalyptic number.

It is an amenable number.

1310120121 is a deficient number, since it is larger than the sum of its proper divisors (477086279).

1310120121 is an equidigital number, since it uses as much as digits as its factorization.

1310120121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57168.

The product of its (nonzero) digits is 12, while the sum is 12.

The square root of 1310120121 is about 36195.5815121128. The cubic root of 1310120121 is about 1094.2176242340.

Adding to 1310120121 its reverse (1210210131), we get a palindrome (2520330252).

The spelling of 1310120121 in words is "one billion, three hundred ten million, one hundred twenty thousand, one hundred twenty-one".