202111002211121 has 2 divisors, whose sum is σ = 202111002211122. Its totient is φ = 202111002211120.

The previous prime is 202111002211109. The next prime is 202111002211169. The reversal of 202111002211121 is 121112200111202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 143486498602225 + 58624503608896 = 11978585^2 + 7656664^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-202111002211121 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 202111002211121.

It is not a weakly prime, because it can be changed into another prime (202111002211421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101055501105560 + 101055501105561.

It is an arithmetic number, because the mean of its divisors is an integer number (101055501105561).

Almost surely, 2^{202111002211121} is an apocalyptic number.

It is an amenable number.

202111002211121 is a deficient number, since it is larger than the sum of its proper divisors (1).

202111002211121 is an equidigital number, since it uses as much as digits as its factorization.

202111002211121 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 17.

Adding to 202111002211121 its reverse (121112200111202), we get a palindrome (323223202322323).

The spelling of 202111002211121 in words is "two hundred two trillion, one hundred eleven billion, two million, two hundred eleven thousand, one hundred twenty-one".