1231501411231 has 24 divisors (see below), whose sum is σ = 1604233749120. Its totient is φ = 923091844896.

The previous prime is 1231501411171. The next prime is 1231501411241. The reversal of 1231501411231 is 1321141051321.

It is a de Polignac number, because none of the positive numbers 2^k-1231501411231 is a prime.

It is a super-2 number, since 2×1231501411231² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1231501411196 and 1231501411205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231501411241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27372225 + ... + 27417178.

It is an arithmetic number, because the mean of its divisors is an integer number (66843072880).

Almost surely, 2^{1231501411231} is an apocalyptic number.

1231501411231 is a deficient number, since it is larger than the sum of its proper divisors (372732337889).

1231501411231 is a wasteful number, since it uses less digits than its factorization.

1231501411231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54789455 (or 54789442 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 25.

Adding to 1231501411231 its reverse (1321141051321), we get a palindrome (2552642462552).

The spelling of 1231501411231 in words is "one trillion, two hundred thirty-one billion, five hundred one million, four hundred eleven thousand, two hundred thirty-one".