210111201121 has 2 divisors, whose sum is σ = 210111201122. Its totient is φ = 210111201120.

The previous prime is 210111201119. The next prime is 210111201227. The reversal of 210111201121 is 121102111012.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 209705380096 + 405821025 = 457936^2 + 20145^2 .

It is a cyclic number.

It is not a de Polignac number, because 210111201121 - 2¹ = 210111201119 is a prime.

It is a super-3 number, since 3×210111201121³ (a number of 35 digits) contains 333 as substring.

Together with 210111201119, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (210111202121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105055600560 + 105055600561.

It is an arithmetic number, because the mean of its divisors is an integer number (105055600561).

Almost surely, 2^210111201121 is an apocalyptic number.

It is an amenable number.

210111201121 is a deficient number, since it is larger than the sum of its proper divisors (1).

210111201121 is an equidigital number, since it uses as much as digits as its factorization.

210111201121 is an evil number, because the sum of its binary digits is even.

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

Adding to 210111201121 its reverse (121102111012), we get a palindrome (331213312133).

The spelling of 210111201121 in words is "two hundred ten billion, one hundred eleven million, two hundred one thousand, one hundred twenty-one".