120111010121 has 4 divisors (see below), whose sum is σ = 120774607044. Its totient is φ = 119447413200.

The previous prime is 120111010099. The next prime is 120111010139. The reversal of 120111010121 is 121010111021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 121010111021 = 29 ⋅4172762449.

It can be written as a sum of positive squares in 2 ways, for example, as 22727070025 + 97383940096 = 150755^2 + 312064^2 .

It is a cyclic number.

It is not a de Polignac number, because 120111010121 - 2³⁰ = 119037268297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (120111016121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 331798190 + ... + 331798551.

It is an arithmetic number, because the mean of its divisors is an integer number (30193651761).

Almost surely, 2^120111010121 is an apocalyptic number.

It is an amenable number.

120111010121 is a deficient number, since it is larger than the sum of its proper divisors (663596923).

120111010121 is an equidigital number, since it uses as much as digits as its factorization.

120111010121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 663596922.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 120111010121 its reverse (121010111021), we get a palindrome (241121121142).

The spelling of 120111010121 in words is "one hundred twenty billion, one hundred eleven million, ten thousand, one hundred twenty-one".