1231303211313 has 32 divisors (see below), whose sum is σ = 1968665567232. Its totient is φ = 669292113600.

The previous prime is 1231303211311. The next prime is 1231303211317. The reversal of 1231303211313 is 3131123031321.

It is not a de Polignac number, because 1231303211313 - 2¹ = 1231303211311 is a prime.

It is a super-2 number, since 2×1231303211313² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1231303211311) 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, 6954793 + ... + 7129638.

It is an arithmetic number, because the mean of its divisors is an integer number (61520798976).

Almost surely, 2^{1231303211313} is an apocalyptic number.

It is an amenable number.

1231303211313 is a deficient number, since it is larger than the sum of its proper divisors (737362355919).

1231303211313 is a wasteful number, since it uses less digits than its factorization.

1231303211313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14084645.

The product of its (nonzero) digits is 972, while the sum is 24.

Adding to 1231303211313 its reverse (3131123031321), we get a palindrome (4362426242634).

The spelling of 1231303211313 in words is "one trillion, two hundred thirty-one billion, three hundred three million, two hundred eleven thousand, three hundred thirteen".