202220112211021 has 2 divisors, whose sum is σ = 202220112211022. Its totient is φ = 202220112211020.

The previous prime is 202220112210973. The next prime is 202220112211037. The reversal of 202220112211021 is 120112211022202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 161004097410121 + 41216014800900 = 12688739^2 + 6419970^2 .

It is a cyclic number.

It is not a de Polignac number, because 202220112211021 - 2¹¹ = 202220112208973 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 202220112211021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202220115211021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101110056105510 + 101110056105511.

It is an arithmetic number, because the mean of its divisors is an integer number (101110056105511).

Almost surely, 2^{202220112211021} is an apocalyptic number.

It is an amenable number.

202220112211021 is a deficient number, since it is larger than the sum of its proper divisors (1).

202220112211021 is an equidigital number, since it uses as much as digits as its factorization.

202220112211021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 202220112211021 its reverse (120112211022202), we get a palindrome (322332323233223).

The spelling of 202220112211021 in words is "two hundred two trillion, two hundred twenty billion, one hundred twelve million, two hundred eleven thousand, twenty-one".