1031321201313 has 96 divisors (see below), whose sum is σ = 1632830766336. Its totient is φ = 574422368256.

The previous prime is 1031321201243. The next prime is 1031321201347. The reversal of 1031321201313 is 3131021231301.

It is a happy number.

It is not a de Polignac number, because 1031321201313 - 2³³ = 1022731266721 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1031321201313.

It is not an unprimeable number, because it can be changed into a prime (1031321271313) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 394083981 + ... + 394086597.

It is an arithmetic number, because the mean of its divisors is an integer number (17008653816).

Almost surely, 2^{1031321201313} is an apocalyptic number.

1031321201313 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1031321201313 is a deficient number, since it is larger than the sum of its proper divisors (601509565023).

1031321201313 is a wasteful number, since it uses less digits than its factorization.

1031321201313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3911 (or 3892 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 1031321201313 its reverse (3131021231301), we get a palindrome (4162342432614).

The spelling of 1031321201313 in words is "one trillion, thirty-one billion, three hundred twenty-one million, two hundred one thousand, three hundred thirteen".