1231530053021 has 8 divisors (see below), whose sum is σ = 1240679247360. Its totient is φ = 1222384991328.

The previous prime is 1231530052943. The next prime is 1231530053041. The reversal of 1231530053021 is 1203500351321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1231530053021 - 2²⁶ = 1231462944157 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231530053041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 433661 + ... + 1628226.

It is an arithmetic number, because the mean of its divisors is an integer number (155084905920).

Almost surely, 2^{1231530053021} is an apocalyptic number.

It is an amenable number.

1231530053021 is a deficient number, since it is larger than the sum of its proper divisors (9149194339).

1231530053021 is a wasteful number, since it uses less digits than its factorization.

1231530053021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2066323.

The product of its (nonzero) digits is 2700, while the sum is 26.

The spelling of 1231530053021 in words is "one trillion, two hundred thirty-one billion, five hundred thirty million, fifty-three thousand, twenty-one".