1313020121 has 32 divisors (see below), whose sum is σ = 1591296000. Its totient is φ = 1082108160.

The previous prime is 1313020031. The next prime is 1313020127. The reversal of 1313020121 is 1210203131.

It is not a de Polignac number, because 1313020121 - 2¹⁸ = 1312757977 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1313020096 and 1313020105.

It is not an unprimeable number, because it can be changed into a prime (1313020127) 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, 1025960 + ... + 1027238.

It is an arithmetic number, because the mean of its divisors is an integer number (49728000).

Almost surely, 2^1313020121 is an apocalyptic number.

It is an amenable number.

1313020121 is a deficient number, since it is larger than the sum of its proper divisors (278275879).

1313020121 is an equidigital number, since it uses as much as digits as its factorization.

1313020121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1414 (or 1400 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 1313020121 is about 36235.6195062262. The cubic root of 1313020121 is about 1095.0243931654.

Adding to 1313020121 its reverse (1210203131), we get a palindrome (2523223252).

The spelling of 1313020121 in words is "one billion, three hundred thirteen million, twenty thousand, one hundred twenty-one".