1231311001302 has 12 divisors (see below), whose sum is σ = 2667840502860. Its totient is φ = 410437000428.

The previous prime is 1231311001259. The next prime is 1231311001357. The reversal of 1231311001302 is 2031001131321.

1231311001302 is a `hidden beast` number, since 1 + 231 + 31 + 100 + 1 + 302 = 666.

It is a super-2 number, since 2×1231311001302² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 68406166739 = 1231311001302 / (1 + 2 + 3 + 1 + 3 + 1 + 1 + 0 + 0 + 1 + 3 + 0 + 2).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 34203083352 + ... + 34203083387.

It is an arithmetic number, because the mean of its divisors is an integer number (222320041905).

Almost surely, 2^{1231311001302} is an apocalyptic number.

1231311001302 is an abundant number, since it is smaller than the sum of its proper divisors (1436529501558).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1231311001302 is a wasteful number, since it uses less digits than its factorization.

1231311001302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68406166747 (or 68406166744 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 1231311001302 its reverse (2031001131321), we get a palindrome (3262312132623).

The spelling of 1231311001302 in words is "one trillion, two hundred thirty-one billion, three hundred eleven million, one thousand, three hundred two".