100221210251 has 2 divisors, whose sum is σ = 100221210252. Its totient is φ = 100221210250.

The previous prime is 100221210233. The next prime is 100221210259. The reversal of 100221210251 is 152012122001.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100221210251 is a prime.

It is not a weakly prime, because it can be changed into another prime (100221210259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50110605125 + 50110605126.

It is an arithmetic number, because the mean of its divisors is an integer number (50110605126).

Almost surely, 2^100221210251 is an apocalyptic number.

100221210251 is a deficient number, since it is larger than the sum of its proper divisors (1).

100221210251 is an equidigital number, since it uses as much as digits as its factorization.

100221210251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80, while the sum is 17.

Adding to 100221210251 its reverse (152012122001), we get a palindrome (252233332252).

The spelling of 100221210251 in words is "one hundred billion, two hundred twenty-one million, two hundred ten thousand, two hundred fifty-one".