1021102110257 has 2 divisors, whose sum is σ = 1021102110258. Its totient is φ = 1021102110256.

The previous prime is 1021102110191. The next prime is 1021102110299. The reversal of 1021102110257 is 7520112011201.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 756454625536 + 264647484721 = 869744^2 + 514439^2 .

It is a cyclic number.

It is not a de Polignac number, because 1021102110257 - 2²⁰ = 1021101061681 is a prime.

It is not a weakly prime, because it can be changed into another prime (1021122110257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510551055128 + 510551055129.

It is an arithmetic number, because the mean of its divisors is an integer number (510551055129).

Almost surely, 2^{1021102110257} is an apocalyptic number.

It is an amenable number.

1021102110257 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021102110257 is an equidigital number, since it uses as much as digits as its factorization.

1021102110257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 280, while the sum is 23.

Adding to 1021102110257 its reverse (7520112011201), we get a palindrome (8541214121458).

The spelling of 1021102110257 in words is "one trillion, twenty-one billion, one hundred two million, one hundred ten thousand, two hundred fifty-seven".