120020311121 has 4 divisors (see below), whose sum is σ = 120642178212. Its totient is φ = 119398444032.

The previous prime is 120020311051. The next prime is 120020311133. The reversal of 120020311121 is 121113020021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 121113020021 = 7 ⋅17301860003.

It can be written as a sum of positive squares in 2 ways, for example, as 8347380496 + 111672930625 = 91364^2 + 334175^2 .

It is a cyclic number.

It is not a de Polignac number, because 120020311121 - 2²² = 120016116817 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 120020311096 and 120020311105.

It is not an unprimeable number, because it can be changed into a prime (120020311181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 310933256 + ... + 310933641.

It is an arithmetic number, because the mean of its divisors is an integer number (30160544553).

Almost surely, 2^120020311121 is an apocalyptic number.

It is an amenable number.

120020311121 is a deficient number, since it is larger than the sum of its proper divisors (621867091).

120020311121 is an equidigital number, since it uses as much as digits as its factorization.

120020311121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 621867090.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 120020311121 its reverse (121113020021), we get a palindrome (241133331142).

The spelling of 120020311121 in words is "one hundred twenty billion, twenty million, three hundred eleven thousand, one hundred twenty-one".