22021020110251 has 2 divisors, whose sum is σ = 22021020110252. Its totient is φ = 22021020110250.

The previous prime is 22021020110203. The next prime is 22021020110371. The reversal of 22021020110251 is 15201102012022.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22021020110251 - 2³⁵ = 21986660371883 is a prime.

It is not a weakly prime, because it can be changed into another prime (22021020113251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11010510055125 + 11010510055126.

It is an arithmetic number, because the mean of its divisors is an integer number (11010510055126).

Almost surely, 2^{22021020110251} is an apocalyptic number.

22021020110251 is a deficient number, since it is larger than the sum of its proper divisors (1).

22021020110251 is an equidigital number, since it uses as much as digits as its factorization.

22021020110251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 160, while the sum is 19.

Adding to 22021020110251 its reverse (15201102012022), we get a palindrome (37222122122273).

The spelling of 22021020110251 in words is "twenty-two trillion, twenty-one billion, twenty million, one hundred ten thousand, two hundred fifty-one".