100221011951 has 2 divisors, whose sum is σ = 100221011952. Its totient is φ = 100221011950.

The previous prime is 100221011929. The next prime is 100221011953. The reversal of 100221011951 is 159110122001.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 100221011951 - 2²² = 100216817647 is a prime.

Together with 100221011953, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100221011953) 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, 50110505975 + 50110505976.

It is an arithmetic number, because the mean of its divisors is an integer number (50110505976).

Almost surely, 2^100221011951 is an apocalyptic number.

100221011951 is a deficient number, since it is larger than the sum of its proper divisors (1).

100221011951 is an equidigital number, since it uses as much as digits as its factorization.

100221011951 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 180, while the sum is 23.

Adding to 100221011951 its reverse (159110122001), we get a palindrome (259331133952).

The spelling of 100221011951 in words is "one hundred billion, two hundred twenty-one million, eleven thousand, nine hundred fifty-one".