120120212221 has 4 divisors (see below), whose sum is σ = 120121166592. Its totient is φ = 120119257852.

The previous prime is 120120212209. The next prime is 120120212239. The reversal of 120120212221 is 122212021021.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 120120212221 - 2¹⁷ = 120120081149 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 120120212195 and 120120212204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120120212281) 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, 253411 + ... + 551776.

It is an arithmetic number, because the mean of its divisors is an integer number (30030291648).

Almost surely, 2^120120212221 is an apocalyptic number.

It is an amenable number.

120120212221 is a deficient number, since it is larger than the sum of its proper divisors (954371).

120120212221 is an equidigital number, since it uses as much as digits as its factorization.

120120212221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 954370.

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

Adding to 120120212221 its reverse (122212021021), we get a palindrome (242332233242).

The spelling of 120120212221 in words is "one hundred twenty billion, one hundred twenty million, two hundred twelve thousand, two hundred twenty-one".