100101020021257 has 2 divisors, whose sum is σ = 100101020021258. Its totient is φ = 100101020021256.

The previous prime is 100101020021209. The next prime is 100101020021263. The reversal of 100101020021257 is 752120020101001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 97175018192121 + 2926001829136 = 9857739^2 + 1710556^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100101020021257 is a prime.

It is not a weakly prime, because it can be changed into another prime (100101020021557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50050510010628 + 50050510010629.

It is an arithmetic number, because the mean of its divisors is an integer number (50050510010629).

Almost surely, 2^{100101020021257} is an apocalyptic number.

It is an amenable number.

100101020021257 is a deficient number, since it is larger than the sum of its proper divisors (1).

100101020021257 is an equidigital number, since it uses as much as digits as its factorization.

100101020021257 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 22.

Adding to 100101020021257 its reverse (752120020101001), we get a palindrome (852221040122258).

The spelling of 100101020021257 in words is "one hundred trillion, one hundred one billion, twenty million, twenty-one thousand, two hundred fifty-seven".