2121907291458 has 8 divisors (see below), whose sum is σ = 4243814582928. Its totient is φ = 707302430484.

The previous prime is 2121907291453. The next prime is 2121907291477. The reversal of 2121907291458 is 8541927091212.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

2121907291458 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 2121907291458.

It is not an unprimeable number, because it can be changed into a prime (2121907291453) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 176825607616 + ... + 176825607627.

It is an arithmetic number, because the mean of its divisors is an integer number (530476822866).

Almost surely, 2^{2121907291458} is an apocalyptic number.

2121907291458 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2121907291458 is a wasteful number, since it uses less digits than its factorization.

2121907291458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353651215248.

The product of its (nonzero) digits is 725760, while the sum is 51.

The spelling of 2121907291458 in words is "two trillion, one hundred twenty-one billion, nine hundred seven million, two hundred ninety-one thousand, four hundred fifty-eight".