120120220202021 has 4 divisors (see below), whose sum is σ = 129360237140652. Its totient is φ = 110880203263392.

The previous prime is 120120220202009. The next prime is 120120220202029. The reversal of 120120220202021 is 120202022021021.

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 46245249748996 + 73874970453025 = 6800386^2 + 8595055^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-120120220202021 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120120220202029) 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, 4620008469296 + ... + 4620008469321.

It is an arithmetic number, because the mean of its divisors is an integer number (32340059285163).

Almost surely, 2^{120120220202021} is an apocalyptic number.

It is an amenable number.

120120220202021 is a deficient number, since it is larger than the sum of its proper divisors (9240016938631).

120120220202021 is an equidigital number, since it uses as much as digits as its factorization.

120120220202021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9240016938630.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 120120220202021 its reverse (120202022021021), we get a palindrome (240322242223042).

The spelling of 120120220202021 in words is "one hundred twenty trillion, one hundred twenty billion, two hundred twenty million, two hundred two thousand, twenty-one".