120121123231 has 4 divisors (see below), whose sum is σ = 120157274952. Its totient is φ = 120084971512.

The previous prime is 120121123229. The next prime is 120121123249. The reversal of 120121123231 is 132321121021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 132321121021 = 79 ⋅1674950899.

It is a cyclic number.

It is not a de Polignac number, because 120121123231 - 2¹ = 120121123229 is a prime.

It is a super-2 number, since 2×120121123231² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 120121123199 and 120121123208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120121123261) 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, 18070876 + ... + 18077521.

It is an arithmetic number, because the mean of its divisors is an integer number (30039318738).

Almost surely, 2^120121123231 is an apocalyptic number.

120121123231 is a deficient number, since it is larger than the sum of its proper divisors (36151721).

120121123231 is an equidigital number, since it uses as much as digits as its factorization.

120121123231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36151720.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 120121123231 its reverse (132321121021), we get a palindrome (252442244252).

The spelling of 120121123231 in words is "one hundred twenty billion, one hundred twenty-one million, one hundred twenty-three thousand, two hundred thirty-one".