262121121257 has 2 divisors, whose sum is σ = 262121121258. Its totient is φ = 262121121256.

The previous prime is 262121121217. The next prime is 262121121287. The reversal of 262121121257 is 752121121262.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 252924503056 + 9196618201 = 502916^2 + 95899^2 .

It is a cyclic number.

It is not a de Polignac number, because 262121121257 - 2⁸ = 262121121001 is a prime.

It is not a weakly prime, because it can be changed into another prime (262121121217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131060560628 + 131060560629.

It is an arithmetic number, because the mean of its divisors is an integer number (131060560629).

Almost surely, 2^262121121257 is an apocalyptic number.

It is an amenable number.

262121121257 is a deficient number, since it is larger than the sum of its proper divisors (1).

262121121257 is an equidigital number, since it uses as much as digits as its factorization.

262121121257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6720, while the sum is 32.

The spelling of 262121121257 in words is "two hundred sixty-two billion, one hundred twenty-one million, one hundred twenty-one thousand, two hundred fifty-seven".