120121100111 has 2 divisors, whose sum is σ = 120121100112. Its totient is φ = 120121100110.

The previous prime is 120121100093. The next prime is 120121100131. The reversal of 120121100111 is 111001121021.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 120121100111 - 2¹⁴ = 120121083727 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 120121100092 and 120121100101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120121100131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60060550055 + 60060550056.

It is an arithmetic number, because the mean of its divisors is an integer number (60060550056).

Almost surely, 2^120121100111 is an apocalyptic number.

120121100111 is a deficient number, since it is larger than the sum of its proper divisors (1).

120121100111 is an equidigital number, since it uses as much as digits as its factorization.

120121100111 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 120121100111 its reverse (111001121021), we get a palindrome (231122221132).

The spelling of 120121100111 in words is "one hundred twenty billion, one hundred twenty-one million, one hundred thousand, one hundred eleven".