202122101989 has 2 divisors, whose sum is σ = 202122101990. Its totient is φ = 202122101988.

The previous prime is 202122101963. The next prime is 202122102019. The reversal of 202122101989 is 989101221202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 124647833025 + 77474268964 = 353055^2 + 278342^2 .

It is a cyclic number.

It is not a de Polignac number, because 202122101989 - 2¹¹ = 202122099941 is a prime.

It is a super-2 number, since 2×202122101989² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202122101689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101061050994 + 101061050995.

It is an arithmetic number, because the mean of its divisors is an integer number (101061050995).

Almost surely, 2^202122101989 is an apocalyptic number.

It is an amenable number.

202122101989 is a deficient number, since it is larger than the sum of its proper divisors (1).

202122101989 is an equidigital number, since it uses as much as digits as its factorization.

202122101989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 37.

The spelling of 202122101989 in words is "two hundred two billion, one hundred twenty-two million, one hundred one thousand, nine hundred eighty-nine".