2100101251 has 2 divisors, whose sum is σ = 2100101252. Its totient is φ = 2100101250.

The previous prime is 2100101243. The next prime is 2100101279. The reversal of 2100101251 is 1521010012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2100101251 - 2³ = 2100101243 is a prime.

It is not a weakly prime, because it can be changed into another prime (2100101281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050050625 + 1050050626.

It is an arithmetic number, because the mean of its divisors is an integer number (1050050626).

Almost surely, 2^2100101251 is an apocalyptic number.

2100101251 is a deficient number, since it is larger than the sum of its proper divisors (1).

2100101251 is an equidigital number, since it uses as much as digits as its factorization.

2100101251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20, while the sum is 13.

The square root of 2100101251 is about 45826.8616752228. The cubic root of 2100101251 is about 1280.5997455966.

Adding to 2100101251 its reverse (1521010012), we get a palindrome (3621111263).

The spelling of 2100101251 in words is "two billion, one hundred million, one hundred one thousand, two hundred fifty-one".