120121111121 has 16 divisors (see below), whose sum is σ = 138788702208. Its totient is φ = 102748396800.

The previous prime is 120121111111. The next prime is 120121111153. The reversal of 120121111121 is 121111121021.

It is a cyclic number.

It is not a de Polignac number, because 120121111121 - 2⁶ = 120121111057 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 120121111096 and 120121111105.

It is not an unprimeable number, because it can be changed into a prime (120121111111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 586736 + ... + 764526.

It is an arithmetic number, because the mean of its divisors is an integer number (8674293888).

Almost surely, 2^120121111121 is an apocalyptic number.

120121111121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

120121111121 is a deficient number, since it is larger than the sum of its proper divisors (18667591087).

120121111121 is a wasteful number, since it uses less digits than its factorization.

120121111121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181432.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 120121111121 its reverse (121111121021), we get a palindrome (241232232142).

The spelling of 120121111121 in words is "one hundred twenty billion, one hundred twenty-one million, one hundred eleven thousand, one hundred twenty-one".