1231256242601 has 32 divisors (see below), whose sum is σ = 1570961323008. Its totient is φ = 936995451840.

The previous prime is 1231256242589. The next prime is 1231256242721. The reversal of 1231256242601 is 1062426521321.

It is a de Polignac number, because none of the positive numbers 2^k-1231256242601 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1231256241601) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 36414035 + ... + 36447831.

It is an arithmetic number, because the mean of its divisors is an integer number (49092541344).

Almost surely, 2^{1231256242601} is an apocalyptic number.

1231256242601 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1231256242601 is a deficient number, since it is larger than the sum of its proper divisors (339705080407).

1231256242601 is a wasteful number, since it uses less digits than its factorization.

1231256242601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44861.

The product of its (nonzero) digits is 34560, while the sum is 35.

The spelling of 1231256242601 in words is "one trillion, two hundred thirty-one billion, two hundred fifty-six million, two hundred forty-two thousand, six hundred one".