210100111121 has 2 divisors, whose sum is σ = 210100111122. Its totient is φ = 210100111120.

The previous prime is 210100111069. The next prime is 210100111127. The reversal of 210100111121 is 121111001012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 186671523025 + 23428588096 = 432055^2 + 153064^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-210100111121 is a prime.

It is not a weakly prime, because it can be changed into another prime (210100111127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105050055560 + 105050055561.

It is an arithmetic number, because the mean of its divisors is an integer number (105050055561).

Almost surely, 2^210100111121 is an apocalyptic number.

It is an amenable number.

210100111121 is a deficient number, since it is larger than the sum of its proper divisors (1).

210100111121 is an equidigital number, since it uses as much as digits as its factorization.

210100111121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 210100111121 its reverse (121111001012), we get a palindrome (331211112133).

The spelling of 210100111121 in words is "two hundred ten billion, one hundred million, one hundred eleven thousand, one hundred twenty-one".