202122121189 has 2 divisors, whose sum is σ = 202122121190. Its totient is φ = 202122121188.

The previous prime is 202122121181. The next prime is 202122121219. The reversal of 202122121189 is 981121221202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 155480376100 + 46641745089 = 394310^2 + 215967^2 .

It is a cyclic number.

It is not a de Polignac number, because 202122121189 - 2³ = 202122121181 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 202122121189.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202122121181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101061060594 + 101061060595.

It is an arithmetic number, because the mean of its divisors is an integer number (101061060595).

Almost surely, 2^202122121189 is an apocalyptic number.

It is an amenable number.

202122121189 is a deficient number, since it is larger than the sum of its proper divisors (1).

202122121189 is an equidigital number, since it uses as much as digits as its factorization.

202122121189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 31.

The spelling of 202122121189 in words is "two hundred two billion, one hundred twenty-two million, one hundred twenty-one thousand, one hundred eighty-nine".