120111100121 has 2 divisors, whose sum is σ = 120111100122. Its totient is φ = 120111100120.

The previous prime is 120111100091. The next prime is 120111100139. The reversal of 120111100121 is 121001111021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 90036603721 + 30074496400 = 300061^2 + 173420^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-120111100121 is a prime.

It is not a weakly prime, because it can be changed into another prime (120111100141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60055550060 + 60055550061.

It is an arithmetic number, because the mean of its divisors is an integer number (60055550061).

Almost surely, 2^120111100121 is an apocalyptic number.

It is an amenable number.

120111100121 is a deficient number, since it is larger than the sum of its proper divisors (1).

120111100121 is an equidigital number, since it uses as much as digits as its factorization.

120111100121 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 120111100121 its reverse (121001111021), we get a palindrome (241112211142).

The spelling of 120111100121 in words is "one hundred twenty billion, one hundred eleven million, one hundred thousand, one hundred twenty-one".