120121012111 has 4 divisors (see below), whose sum is σ = 121812857424. Its totient is φ = 118429166800.

The previous prime is 120121012093. The next prime is 120121012171. The reversal of 120121012111 is 111210121021.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 111210121021 = 97 ⋅1146496093.

It is a cyclic number.

It is not a de Polignac number, because 120121012111 - 2¹⁵ = 120120979343 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 120121012091 and 120121012100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120121012171) 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, 845922550 + ... + 845922691.

It is an arithmetic number, because the mean of its divisors is an integer number (30453214356).

Almost surely, 2^120121012111 is an apocalyptic number.

120121012111 is a deficient number, since it is larger than the sum of its proper divisors (1691845313).

120121012111 is an equidigital number, since it uses as much as digits as its factorization.

120121012111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1691845312.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 120121012111 its reverse (111210121021), we get a palindrome (231331133132).

The spelling of 120121012111 in words is "one hundred twenty billion, one hundred twenty-one million, twelve thousand, one hundred eleven".