110111002121 has 2 divisors, whose sum is σ = 110111002122. Its totient is φ = 110111002120.

The previous prime is 110111002117. The next prime is 110111002139. The reversal of 110111002121 is 121200111011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 100283055625 + 9827946496 = 316675^2 + 99136^2 .

It is a cyclic number.

It is not a de Polignac number, because 110111002121 - 2² = 110111002117 is a prime.

It is a super-3 number, since 3×110111002121³ (a number of 34 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (110111002151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55055501060 + 55055501061.

It is an arithmetic number, because the mean of its divisors is an integer number (55055501061).

Almost surely, 2^110111002121 is an apocalyptic number.

It is an amenable number.

110111002121 is a deficient number, since it is larger than the sum of its proper divisors (1).

110111002121 is an equidigital number, since it uses as much as digits as its factorization.

110111002121 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 110111002121 its reverse (121200111011), we get a palindrome (231311113132).

The spelling of 110111002121 in words is "one hundred ten billion, one hundred eleven million, two thousand, one hundred twenty-one".