1231161425145 has 48 divisors (see below), whose sum is σ = 2227793293440. Its totient is φ = 627789558528.

The previous prime is 1231161425129. The next prime is 1231161425147. The reversal of 1231161425145 is 5415241611321.

1231161425145 is a `hidden beast` number, since 1 + 2 + 3 + 1 + 1 + 614 + 25 + 14 + 5 = 666.

It is not a de Polignac number, because 1231161425145 - 2⁴ = 1231161425129 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1231161425147) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2056341 + ... + 2586669.

It is an arithmetic number, because the mean of its divisors is an integer number (46412360280).

Almost surely, 2^{1231161425145} is an apocalyptic number.

1231161425145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1231161425145 is a deficient number, since it is larger than the sum of its proper divisors (996631868295).

1231161425145 is a wasteful number, since it uses less digits than its factorization.

1231161425145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 532606 (or 532603 counting only the distinct ones).

The product of its digits is 28800, while the sum is 36.

The spelling of 1231161425145 in words is "one trillion, two hundred thirty-one billion, one hundred sixty-one million, four hundred twenty-five thousand, one hundred forty-five".