100210219721 has 2 divisors, whose sum is σ = 100210219722. Its totient is φ = 100210219720.

The previous prime is 100210219709. The next prime is 100210219757. The reversal of 100210219721 is 127912012001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60912708025 + 39297511696 = 246805^2 + 198236^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100210219721 is a prime.

It is not a weakly prime, because it can be changed into another prime (100210219621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50105109860 + 50105109861.

It is an arithmetic number, because the mean of its divisors is an integer number (50105109861).

Almost surely, 2^100210219721 is an apocalyptic number.

It is an amenable number.

100210219721 is a deficient number, since it is larger than the sum of its proper divisors (1).

100210219721 is an equidigital number, since it uses as much as digits as its factorization.

100210219721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504, while the sum is 26.

The spelling of 100210219721 in words is "one hundred billion, two hundred ten million, two hundred nineteen thousand, seven hundred twenty-one".