2121830455199 has 12 divisors (see below), whose sum is σ = 2658117274344. Its totient is φ = 1678810909104.

The previous prime is 2121830455181. The next prime is 2121830455211. The reversal of 2121830455199 is 9915540381212.

It is not a de Polignac number, because 2121830455199 - 2¹⁶ = 2121830389663 is a prime.

It is a super-2 number, since 2×2121830455199² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121830455099) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1665486377 + ... + 1665487650.

It is an arithmetic number, because the mean of its divisors is an integer number (221509772862).

Almost surely, 2^{2121830455199} is an apocalyptic number.

2121830455199 is a deficient number, since it is larger than the sum of its proper divisors (536286819145).

2121830455199 is a wasteful number, since it uses less digits than its factorization.

2121830455199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3330974054 (or 3330974047 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 50.

The spelling of 2121830455199 in words is "two trillion, one hundred twenty-one billion, eight hundred thirty million, four hundred fifty-five thousand, one hundred ninety-nine".