1231128565932 has 24 divisors (see below), whose sum is σ = 2895252484096. Its totient is φ = 407144879568.

The previous prime is 1231128565913. The next prime is 1231128565949. The reversal of 1231128565932 is 2395658211321.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 403912048 + ... + 403915095.

Almost surely, 2^{1231128565932} is an apocalyptic number.

1231128565932 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1231128565932 is an abundant number, since it is smaller than the sum of its proper divisors (1664123918164).

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

1231128565932 is a wasteful number, since it uses less digits than its factorization.

1231128565932 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 807827277 (or 807827275 counting only the distinct ones).

The product of its digits is 777600, while the sum is 48.

The spelling of 1231128565932 in words is "one trillion, two hundred thirty-one billion, one hundred twenty-eight million, five hundred sixty-five thousand, nine hundred thirty-two".