1231430552001 has 40 divisors (see below), whose sum is σ = 2018426172840. Its totient is φ = 743505205248.

The previous prime is 1231430551997. The next prime is 1231430552041. The reversal of 1231430552001 is 1002550341321.

1231430552001 is a `hidden beast` number, since 1 + 23 + 1 + 430 + 5 + 5 + 200 + 1 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 7256484225 + 1224174067776 = 85185^2 + 1106424^2 .

It is not a de Polignac number, because 1231430552001 - 2² = 1231430551997 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1231430552041) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 10976736 + ... + 11088353.

It is an arithmetic number, because the mean of its divisors is an integer number (50460654321).

Almost surely, 2^{1231430552001} is an apocalyptic number.

It is an amenable number.

1231430552001 is a deficient number, since it is larger than the sum of its proper divisors (786995620839).

1231430552001 is a wasteful number, since it uses less digits than its factorization.

1231430552001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22065167 (or 22065158 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

Adding to 1231430552001 its reverse (1002550341321), we get a palindrome (2233980893322).

The spelling of 1231430552001 in words is "one trillion, two hundred thirty-one billion, four hundred thirty million, five hundred fifty-two thousand, one".