120212221221 has 48 divisors (see below), whose sum is σ = 177124147200. Its totient is φ = 78552833184.

The previous prime is 120212221169. The next prime is 120212221231. The reversal of 120212221221 is 122122212021.

It is a happy number.

120212221221 is a `hidden beast` number, since 12 + 0 + 212 + 221 + 221 = 666.

It is not a de Polignac number, because 120212221221 - 2¹³ = 120212213029 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 120212221194 and 120212221203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120212221231) 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 47 ways as a sum of consecutive naturals, for example, 53689020 + ... + 53691258.

It is an arithmetic number, because the mean of its divisors is an integer number (3690086400).

Almost surely, 2^120212221221 is an apocalyptic number.

It is an amenable number.

120212221221 is a deficient number, since it is larger than the sum of its proper divisors (56911925979).

120212221221 is a wasteful number, since it uses less digits than its factorization.

120212221221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2918 (or 2915 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 120212221221 its reverse (122122212021), we get a palindrome (242334433242).

The spelling of 120212221221 in words is "one hundred twenty billion, two hundred twelve million, two hundred twenty-one thousand, two hundred twenty-one".