1210100257 has 2 divisors, whose sum is σ = 1210100258. Its totient is φ = 1210100256.

The previous prime is 1210100251. The next prime is 1210100303. The reversal of 1210100257 is 7520010121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 647651601 + 562448656 = 25449^2 + 23716^2 .

It is a cyclic number.

It is not a de Polignac number, because 1210100257 - 2²³ = 1201711649 is a prime.

It is not a weakly prime, because it can be changed into another prime (1210100251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605050128 + 605050129.

It is an arithmetic number, because the mean of its divisors is an integer number (605050129).

Almost surely, 2^1210100257 is an apocalyptic number.

It is an amenable number.

1210100257 is a deficient number, since it is larger than the sum of its proper divisors (1).

1210100257 is an equidigital number, since it uses as much as digits as its factorization.

1210100257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 140, while the sum is 19.

The square root of 1210100257 is about 34786.4953250539. The cubic root of 1210100257 is about 1065.6316668308.

Adding to 1210100257 its reverse (7520010121), we get a palindrome (8730110378).

The spelling of 1210100257 in words is "one billion, two hundred ten million, one hundred thousand, two hundred fifty-seven".