111010002121 has 2 divisors, whose sum is σ = 111010002122. Its totient is φ = 111010002120.

The previous prime is 111010002097. The next prime is 111010002137. The reversal of 111010002121 is 121200010111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 94371840000 + 16638162121 = 307200^2 + 128989^2 .

It is a cyclic number.

It is not a de Polignac number, because 111010002121 - 2¹⁹ = 111009477833 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111010002098 and 111010002107.

It is not a weakly prime, because it can be changed into another prime (111010002221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55505001060 + 55505001061.

It is an arithmetic number, because the mean of its divisors is an integer number (55505001061).

Almost surely, 2^111010002121 is an apocalyptic number.

It is an amenable number.

111010002121 is a deficient number, since it is larger than the sum of its proper divisors (1).

111010002121 is an equidigital number, since it uses as much as digits as its factorization.

111010002121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 111010002121 its reverse (121200010111), we get a palindrome (232210012232).

The spelling of 111010002121 in words is "one hundred eleven billion, ten million, two thousand, one hundred twenty-one".