100442661251 has 2 divisors, whose sum is σ = 100442661252. Its totient is φ = 100442661250.

The previous prime is 100442661191. The next prime is 100442661269. The reversal of 100442661251 is 152166244001.

It is a strong prime.

It is an emirp because it is prime and its reverse (152166244001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 100442661251 - 2¹⁸ = 100442399107 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (100442661281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50221330625 + 50221330626.

It is an arithmetic number, because the mean of its divisors is an integer number (50221330626).

Almost surely, 2^100442661251 is an apocalyptic number.

100442661251 is a deficient number, since it is larger than the sum of its proper divisors (1).

100442661251 is an equidigital number, since it uses as much as digits as its factorization.

100442661251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11520, while the sum is 32.

The spelling of 100442661251 in words is "one hundred billion, four hundred forty-two million, six hundred sixty-one thousand, two hundred fifty-one".