1231455044205 has 24 divisors (see below), whose sum is σ = 2135719367808. Its totient is φ = 656407626336.

The previous prime is 1231455044177. The next prime is 1231455044227. The reversal of 1231455044205 is 5024405541321.

1231455044205 is a `hidden beast` number, since 1 + 2 + 3 + 145 + 504 + 4 + 2 + 0 + 5 = 666.

It is not a de Polignac number, because 1231455044205 - 2¹⁴ = 1231455027821 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1231455044205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7593817 + ... + 7754286.

It is an arithmetic number, because the mean of its divisors is an integer number (88988306992).

Almost surely, 2^{1231455044205} is an apocalyptic number.

1231455044205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1231455044205 is a deficient number, since it is larger than the sum of its proper divisors (904264323603).

1231455044205 is a wasteful number, since it uses less digits than its factorization.

1231455044205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15349897 (or 15349894 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 36.

The spelling of 1231455044205 in words is "one trillion, two hundred thirty-one billion, four hundred fifty-five million, forty-four thousand, two hundred five".