2545320207121 has 2 divisors, whose sum is σ = 2545320207122. Its totient is φ = 2545320207120.

The previous prime is 2545320207083. The next prime is 2545320207203. The reversal of 2545320207121 is 1217020235452.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2084951172096 + 460369035025 = 1443936^2 + 678505^2 .

It is a cyclic number.

It is not a de Polignac number, because 2545320207121 - 2¹³ = 2545320198929 is a prime.

It is not a weakly prime, because it can be changed into another prime (2545320207421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1272660103560 + 1272660103561.

It is an arithmetic number, because the mean of its divisors is an integer number (1272660103561).

Almost surely, 2^{2545320207121} is an apocalyptic number.

It is an amenable number.

2545320207121 is a deficient number, since it is larger than the sum of its proper divisors (1).

2545320207121 is an equidigital number, since it uses as much as digits as its factorization.

2545320207121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 33600, while the sum is 34.

The spelling of 2545320207121 in words is "two trillion, five hundred forty-five billion, three hundred twenty million, two hundred seven thousand, one hundred twenty-one".