120112200220021 has 4 divisors (see below), whose sum is σ = 120113237135500. Its totient is φ = 120111163304544.

The previous prime is 120112200220007. The next prime is 120112200220123. The reversal of 120112200220021 is 120022002211021.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 87219050304996 + 32893149915025 = 9339114^2 + 5735255^2 .

It is a cyclic number.

It is not a de Polignac number, because 120112200220021 - 2²⁷ = 120112066002293 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 120112200219977 and 120112200220004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120112200220321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 518283966 + ... + 518515663.

It is an arithmetic number, because the mean of its divisors is an integer number (30028309283875).

Almost surely, 2^{120112200220021} is an apocalyptic number.

It is an amenable number.

120112200220021 is a deficient number, since it is larger than the sum of its proper divisors (1036915479).

120112200220021 is a wasteful number, since it uses less digits than its factorization.

120112200220021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1036915478.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 120112200220021 its reverse (120022002211021), we get a palindrome (240134202431042).

The spelling of 120112200220021 in words is "one hundred twenty trillion, one hundred twelve billion, two hundred million, two hundred twenty thousand, twenty-one".