202220111021 has 2 divisors, whose sum is σ = 202220111022. Its totient is φ = 202220111020.

The previous prime is 202220110993. The next prime is 202220111081. The reversal of 202220111021 is 120111022202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 134846121796 + 67373989225 = 367214^2 + 259565^2 .

It is a cyclic number.

It is not a de Polignac number, because 202220111021 - 2¹⁰ = 202220109997 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 202220110987 and 202220111005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202220111081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101110055510 + 101110055511.

It is an arithmetic number, because the mean of its divisors is an integer number (101110055511).

Almost surely, 2^202220111021 is an apocalyptic number.

It is an amenable number.

202220111021 is a deficient number, since it is larger than the sum of its proper divisors (1).

202220111021 is an equidigital number, since it uses as much as digits as its factorization.

202220111021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 202220111021 its reverse (120111022202), we get a palindrome (322331133223).

The spelling of 202220111021 in words is "two hundred two billion, two hundred twenty million, one hundred eleven thousand, twenty-one".