1242300921391 has 16 divisors (see below), whose sum is σ = 1267307596800. Its totient is φ = 1217580831808.

The previous prime is 1242300921377. The next prime is 1242300921409. The reversal of 1242300921391 is 1931290032421.

It is a cyclic number.

It is not a de Polignac number, because 1242300921391 - 2⁷ = 1242300921263 is a prime.

It is a super-2 number, since 2×1242300921391² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1242300921391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242300921341) 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, 5219406 + ... + 5452228.

It is an arithmetic number, because the mean of its divisors is an integer number (79206724800).

Almost surely, 2^{1242300921391} is an apocalyptic number.

1242300921391 is a deficient number, since it is larger than the sum of its proper divisors (25006675409).

1242300921391 is a wasteful number, since it uses less digits than its factorization.

1242300921391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233438.

The product of its (nonzero) digits is 23328, while the sum is 37.

The spelling of 1242300921391 in words is "one trillion, two hundred forty-two billion, three hundred million, nine hundred twenty-one thousand, three hundred ninety-one".