202111101121 has 2 divisors, whose sum is σ = 202111101122. Its totient is φ = 202111101120.

The previous prime is 202111101061. The next prime is 202111101131. The reversal of 202111101121 is 121101111202.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 199240820496 + 2870280625 = 446364^2 + 53575^2 .

It is a cyclic number.

It is not a de Polignac number, because 202111101121 - 2¹⁵ = 202111068353 is a prime.

It is not a weakly prime, because it can be changed into another prime (202111101131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101055550560 + 101055550561.

It is an arithmetic number, because the mean of its divisors is an integer number (101055550561).

Almost surely, 2^202111101121 is an apocalyptic number.

It is an amenable number.

202111101121 is a deficient number, since it is larger than the sum of its proper divisors (1).

202111101121 is an equidigital number, since it uses as much as digits as its factorization.

202111101121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 202111101121 its reverse (121101111202), we get a palindrome (323212212323).

The spelling of 202111101121 in words is "two hundred two billion, one hundred eleven million, one hundred one thousand, one hundred twenty-one".