120311023121 has 4 divisors (see below), whose sum is σ = 120313723200. Its totient is φ = 120308323044.

The previous prime is 120311023099. The next prime is 120311023123. The reversal of 120311023121 is 121320113021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 121320113021 = 499 ⋅243126479.

It is a cyclic number.

It is not a de Polignac number, because 120311023121 - 2¹⁴ = 120311006737 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 120311023121.

It is not an unprimeable number, because it can be changed into a prime (120311023123) 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, 1282061 + ... + 1372698.

It is an arithmetic number, because the mean of its divisors is an integer number (30078430800).

Almost surely, 2^120311023121 is an apocalyptic number.

It is an amenable number.

120311023121 is a deficient number, since it is larger than the sum of its proper divisors (2700079).

120311023121 is an equidigital number, since it uses as much as digits as its factorization.

120311023121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2700078.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 120311023121 its reverse (121320113021), we get a palindrome (241631136142).

The spelling of 120311023121 in words is "one hundred twenty billion, three hundred eleven million, twenty-three thousand, one hundred twenty-one".