1231012553512 has 16 divisors (see below), whose sum is σ = 2637884043360. Its totient is φ = 527576808624.

The previous prime is 1231012553503. The next prime is 1231012553527. The reversal of 1231012553512 is 2153552101321.

It is a happy number.

It is a super-3 number, since 3×1231012553512³ (a number of 37 digits) contains 333 as substring.

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, 10991183458 + ... + 10991183569.

It is an arithmetic number, because the mean of its divisors is an integer number (164867752710).

Almost surely, 2^{1231012553512} is an apocalyptic number.

It is an amenable number.

1231012553512 is an abundant number, since it is smaller than the sum of its proper divisors (1406871489848).

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

1231012553512 is a wasteful number, since it uses less digits than its factorization.

1231012553512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21982367040 (or 21982367036 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 31.

Adding to 1231012553512 its reverse (2153552101321), we get a palindrome (3384564654833).

The spelling of 1231012553512 in words is "one trillion, two hundred thirty-one billion, twelve million, five hundred fifty-three thousand, five hundred twelve".