101222020021 has 2 divisors, whose sum is σ = 101222020022. Its totient is φ = 101222020020.

The previous prime is 101222020013. The next prime is 101222020051. The reversal of 101222020021 is 120020222101.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 58668106225 + 42553913796 = 242215^2 + 206286^2 .

It is a cyclic number.

It is not a de Polignac number, because 101222020021 - 2³ = 101222020013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 101222019983 and 101222020010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101222020001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50611010010 + 50611010011.

It is an arithmetic number, because the mean of its divisors is an integer number (50611010011).

Almost surely, 2^101222020021 is an apocalyptic number.

It is an amenable number.

101222020021 is a deficient number, since it is larger than the sum of its proper divisors (1).

101222020021 is an equidigital number, since it uses as much as digits as its factorization.

101222020021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 101222020021 its reverse (120020222101), we get a palindrome (221242242122).

The spelling of 101222020021 in words is "one hundred one billion, two hundred twenty-two million, twenty thousand, twenty-one".