2125796076421 has 2 divisors, whose sum is σ = 2125796076422. Its totient is φ = 2125796076420.

The previous prime is 2125796076419. The next prime is 2125796076433. The reversal of 2125796076421 is 1246706975212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1931349472900 + 194446603521 = 1389730^2 + 440961^2 .

It is a cyclic number.

It is not a de Polignac number, because 2125796076421 - 2¹ = 2125796076419 is a prime.

Together with 2125796076419, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2125796076401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1062898038210 + 1062898038211.

It is an arithmetic number, because the mean of its divisors is an integer number (1062898038211).

Almost surely, 2^{2125796076421} is an apocalyptic number.

It is an amenable number.

2125796076421 is a deficient number, since it is larger than the sum of its proper divisors (1).

2125796076421 is an equidigital number, since it uses as much as digits as its factorization.

2125796076421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2540160, while the sum is 52.

The spelling of 2125796076421 in words is "two trillion, one hundred twenty-five billion, seven hundred ninety-six million, seventy-six thousand, four hundred twenty-one".