250121345261 has 2 divisors, whose sum is σ = 250121345262. Its totient is φ = 250121345260.

The previous prime is 250121345237. The next prime is 250121345267. The reversal of 250121345261 is 162543121052.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 139644216100 + 110477129161 = 373690^2 + 332381^2 .

It is a cyclic number.

It is not a de Polignac number, because 250121345261 - 2¹⁸ = 250121083117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (250121345267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125060672630 + 125060672631.

It is an arithmetic number, because the mean of its divisors is an integer number (125060672631).

Almost surely, 2^250121345261 is an apocalyptic number.

It is an amenable number.

250121345261 is a deficient number, since it is larger than the sum of its proper divisors (1).

250121345261 is an equidigital number, since it uses as much as digits as its factorization.

250121345261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14400, while the sum is 32.

The spelling of 250121345261 in words is "two hundred fifty billion, one hundred twenty-one million, three hundred forty-five thousand, two hundred sixty-one".