2120120030221 has 4 divisors (see below), whose sum is σ = 2193227617500. Its totient is φ = 2047012442944.

The previous prime is 2120120030219. The next prime is 2120120030243. The reversal of 2120120030221 is 1220300210212.

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 668492652996 + 1451627377225 = 817614^2 + 1204835^2 .

It is a cyclic number.

It is not a de Polignac number, because 2120120030221 - 2¹ = 2120120030219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2120120030195 and 2120120030204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120120030251) 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, 36553793596 + ... + 36553793653.

It is an arithmetic number, because the mean of its divisors is an integer number (548306904375).

Almost surely, 2^{2120120030221} is an apocalyptic number.

It is an amenable number.

2120120030221 is a deficient number, since it is larger than the sum of its proper divisors (73107587279).

2120120030221 is an equidigital number, since it uses as much as digits as its factorization.

2120120030221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73107587278.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 2120120030221 its reverse (1220300210212), we get a palindrome (3340420240433).

The spelling of 2120120030221 in words is "two trillion, one hundred twenty billion, one hundred twenty million, thirty thousand, two hundred twenty-one".