2121666592318 has 64 divisors (see below), whose sum is σ = 3927877349760. Its totient is φ = 836995203072.

The previous prime is 2121666592313. The next prime is 2121666592361. The reversal of 2121666592318 is 8132956661212.

It is a happy number.

It is a super-3 number, since 3×2121666592318³ (a number of 38 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121666592313) 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, 201501678 + ... + 201512206.

It is an arithmetic number, because the mean of its divisors is an integer number (61373083590).

Almost surely, 2^{2121666592318} is an apocalyptic number.

2121666592318 is a deficient number, since it is larger than the sum of its proper divisors (1806210757442).

2121666592318 is a wasteful number, since it uses less digits than its factorization.

2121666592318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13541.

The product of its digits is 1866240, while the sum is 52.

The spelling of 2121666592318 in words is "two trillion, one hundred twenty-one billion, six hundred sixty-six million, five hundred ninety-two thousand, three hundred eighteen".