1231523011372 has 12 divisors (see below), whose sum is σ = 2155173154120. Its totient is φ = 615759253056.

The previous prime is 1231523011339. The next prime is 1231523011387. The reversal of 1231523011372 is 2731103251321.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1537879 + ... + 2197297.

Almost surely, 2^{1231523011372} is an apocalyptic number.

It is an amenable number.

1231523011372 is a deficient number, since it is larger than the sum of its proper divisors (923650142748).

1231523011372 is a wasteful number, since it uses less digits than its factorization.

1231523011372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1126320 (or 1126318 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 31.

Adding to 1231523011372 its reverse (2731103251321), we get a palindrome (3962626262693).

The spelling of 1231523011372 in words is "one trillion, two hundred thirty-one billion, five hundred twenty-three million, eleven thousand, three hundred seventy-two".