2121976903373 has 2 divisors, whose sum is σ = 2121976903374. Its totient is φ = 2121976903372.

The previous prime is 2121976903367. The next prime is 2121976903399. The reversal of 2121976903373 is 3733096791212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2110912598404 + 11064304969 = 1452898^2 + 105187^2 .

It is a cyclic number.

It is not a de Polignac number, because 2121976903373 - 2²⁶ = 2121909794509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2121976909373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060988451686 + 1060988451687.

It is an arithmetic number, because the mean of its divisors is an integer number (1060988451687).

Almost surely, 2^{2121976903373} is an apocalyptic number.

It is an amenable number.

2121976903373 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121976903373 is an equidigital number, since it uses as much as digits as its factorization.

2121976903373 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2571912, while the sum is 53.

The spelling of 2121976903373 in words is "two trillion, one hundred twenty-one billion, nine hundred seventy-six million, nine hundred three thousand, three hundred seventy-three".