2421404023261 has 2 divisors, whose sum is σ = 2421404023262. Its totient is φ = 2421404023260.

The previous prime is 2421404023201. The next prime is 2421404023273. The reversal of 2421404023261 is 1623204041242.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1961733583161 + 459670440100 = 1400619^2 + 677990^2 .

It is a cyclic number.

It is not a de Polignac number, because 2421404023261 - 2⁹ = 2421404022749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2421404023201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1210702011630 + 1210702011631.

It is an arithmetic number, because the mean of its divisors is an integer number (1210702011631).

Almost surely, 2^{2421404023261} is an apocalyptic number.

It is an amenable number.

2421404023261 is a deficient number, since it is larger than the sum of its proper divisors (1).

2421404023261 is an equidigital number, since it uses as much as digits as its factorization.

2421404023261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18432, while the sum is 31.

The spelling of 2421404023261 in words is "two trillion, four hundred twenty-one billion, four hundred four million, twenty-three thousand, two hundred sixty-one".