2125744321 has 2 divisors, whose sum is σ = 2125744322. Its totient is φ = 2125744320.

The previous prime is 2125744319. The next prime is 2125744333. The reversal of 2125744321 is 1234475212.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1994962225 + 130782096 = 44665^2 + 11436^2 .

It is a cyclic number.

It is not a de Polignac number, because 2125744321 - 2¹ = 2125744319 is a prime.

Together with 2125744319, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2125744391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1062872160 + 1062872161.

It is an arithmetic number, because the mean of its divisors is an integer number (1062872161).

Almost surely, 2^2125744321 is an apocalyptic number.

It is an amenable number.

2125744321 is a deficient number, since it is larger than the sum of its proper divisors (1).

2125744321 is an equidigital number, since it uses as much as digits as its factorization.

2125744321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13440, while the sum is 31.

The square root of 2125744321 is about 46105.7948743973. The cubic root of 2125744321 is about 1285.7908843859.

The spelling of 2125744321 in words is "two billion, one hundred twenty-five million, seven hundred forty-four thousand, three hundred twenty-one".