120202020221 has 4 divisors (see below), whose sum is σ = 124346917500. Its totient is φ = 116057122944.

The previous prime is 120202020199. The next prime is 120202020227. The reversal of 120202020221 is 122020202021.

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 22474507225 + 97727512996 = 149915^2 + 312614^2 .

It is a cyclic number.

It is not a de Polignac number, because 120202020221 - 2¹⁴ = 120202003837 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 120202020196 and 120202020205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120202020227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2072448596 + ... + 2072448653.

It is an arithmetic number, because the mean of its divisors is an integer number (31086729375).

Almost surely, 2^120202020221 is an apocalyptic number.

It is an amenable number.

120202020221 is a deficient number, since it is larger than the sum of its proper divisors (4144897279).

120202020221 is an equidigital number, since it uses as much as digits as its factorization.

120202020221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4144897278.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 120202020221 its reverse (122020202021), we get a palindrome (242222222242).

The spelling of 120202020221 in words is "one hundred twenty billion, two hundred two million, twenty thousand, two hundred twenty-one".