1231355105025 has 48 divisors (see below), whose sum is σ = 2067974307840. Its totient is φ = 646415380800.

The previous prime is 1231355104957. The next prime is 1231355105047. The reversal of 1231355105025 is 5205015531321.

It is a happy number.

It is not a de Polignac number, because 1231355105025 - 2⁷ = 1231355104897 is a prime.

It is a super-2 number, since 2×1231355105025² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1322016 + ... + 2051934.

It is an arithmetic number, because the mean of its divisors is an integer number (43082798080).

Almost surely, 2^{1231355105025} is an apocalyptic number.

1231355105025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1231355105025 is a deficient number, since it is larger than the sum of its proper divisors (836619202815).

1231355105025 is a wasteful number, since it uses less digits than its factorization.

1231355105025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 730286 (or 730281 counting only the distinct ones).

The product of its (nonzero) digits is 22500, while the sum is 33.

The spelling of 1231355105025 in words is "one trillion, two hundred thirty-one billion, three hundred fifty-five million, one hundred five thousand, twenty-five".