2127451408261 has 2 divisors, whose sum is σ = 2127451408262. Its totient is φ = 2127451408260.

The previous prime is 2127451408237. The next prime is 2127451408283. The reversal of 2127451408261 is 1628041547212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2127353517025 + 97891236 = 1458545^2 + 9894^2 .

It is a cyclic number.

It is not a de Polignac number, because 2127451408261 - 2⁹ = 2127451407749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2127451448261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1063725704130 + 1063725704131.

It is an arithmetic number, because the mean of its divisors is an integer number (1063725704131).

Almost surely, 2^{2127451408261} is an apocalyptic number.

It is an amenable number.

2127451408261 is a deficient number, since it is larger than the sum of its proper divisors (1).

2127451408261 is an equidigital number, since it uses as much as digits as its factorization.

2127451408261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 215040, while the sum is 43.

The spelling of 2127451408261 in words is "two trillion, one hundred twenty-seven billion, four hundred fifty-one million, four hundred eight thousand, two hundred sixty-one".