111110100121 has 2 divisors, whose sum is σ = 111110100122. Its totient is φ = 111110100120.

The previous prime is 111110100107. The next prime is 111110100139. The reversal of 111110100121 is 121001011111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61732371600 + 49377728521 = 248460^2 + 222211^2 .

It is a cyclic number.

It is not a de Polignac number, because 111110100121 - 2⁹ = 111110099609 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111110100098 and 111110100107.

It is not a weakly prime, because it can be changed into another prime (111110100181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55555050060 + 55555050061.

It is an arithmetic number, because the mean of its divisors is an integer number (55555050061).

Almost surely, 2^111110100121 is an apocalyptic number.

It is an amenable number.

111110100121 is a deficient number, since it is larger than the sum of its proper divisors (1).

111110100121 is an equidigital number, since it uses as much as digits as its factorization.

111110100121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2, while the sum is 10.

Adding to 111110100121 its reverse (121001011111), we get a palindrome (232111111232).

The spelling of 111110100121 in words is "one hundred eleven billion, one hundred ten million, one hundred thousand, one hundred twenty-one".