1231454530021 has 16 divisors (see below), whose sum is σ = 1242971009280. Its totient is φ = 1219991958720.

The previous prime is 1231454530003. The next prime is 1231454530043. The reversal of 1231454530021 is 1200354541321.

It is a cyclic number.

It is not a de Polignac number, because 1231454530021 - 2²¹ = 1231452432869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231454530051) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78065691 + ... + 78081463.

It is an arithmetic number, because the mean of its divisors is an integer number (77685688080).

Almost surely, 2^{1231454530021} is an apocalyptic number.

It is an amenable number.

1231454530021 is a deficient number, since it is larger than the sum of its proper divisors (11516479259).

1231454530021 is a wasteful number, since it uses less digits than its factorization.

1231454530021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17436.

The product of its (nonzero) digits is 14400, while the sum is 31.

The spelling of 1231454530021 in words is "one trillion, two hundred thirty-one billion, four hundred fifty-four million, five hundred thirty thousand, twenty-one".