342117090921 has 16 divisors (see below), whose sum is σ = 491343482880. Its totient is φ = 211124150160.

The previous prime is 342117090919. The next prime is 342117090923. The reversal of 342117090921 is 129090711243.

It is an interprime number because it is at equal distance from previous prime (342117090919) and next prime (342117090923).

It is not a de Polignac number, because 342117090921 - 2¹ = 342117090919 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 342117090921.

It is not an unprimeable number, because it can be changed into a prime (342117090923) 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, 79969131 + ... + 79973408.

It is an arithmetic number, because the mean of its divisors is an integer number (30708967680).

Almost surely, 2^342117090921 is an apocalyptic number.

342117090921 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

342117090921 is a deficient number, since it is larger than the sum of its proper divisors (149226391959).

342117090921 is a wasteful number, since it uses less digits than its factorization.

342117090921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159942596.

The product of its (nonzero) digits is 27216, while the sum is 39.

The spelling of 342117090921 in words is "three hundred forty-two billion, one hundred seventeen million, ninety thousand, nine hundred twenty-one".