102222020080021 has 2 divisors, whose sum is σ = 102222020080022. Its totient is φ = 102222020080020.

The previous prime is 102222020079941. The next prime is 102222020080049. The reversal of 102222020080021 is 120080020222201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67920921202225 + 34301098877796 = 8241415^2 + 5856714^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102222020080021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 102222020079974 and 102222020080001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102222020080051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51111010040010 + 51111010040011.

It is an arithmetic number, because the mean of its divisors is an integer number (51111010040011).

Almost surely, 2^{102222020080021} is an apocalyptic number.

It is an amenable number.

102222020080021 is a deficient number, since it is larger than the sum of its proper divisors (1).

102222020080021 is an equidigital number, since it uses as much as digits as its factorization.

102222020080021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 512, while the sum is 22.

The spelling of 102222020080021 in words is "one hundred two trillion, two hundred twenty-two billion, twenty million, eighty thousand, twenty-one".