120021201221 has 8 divisors (see below), whose sum is σ = 120930512280. Its totient is φ = 119115240192.

The previous prime is 120021201121. The next prime is 120021201233. The reversal of 120021201221 is 122102120021.

It can be written as a sum of positive squares in 4 ways, for example, as 7222620196 + 112798581025 = 84986^2 + 335855^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-120021201221 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 120021201196 and 120021201205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120021201121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 765560 + ... + 908913.

It is an arithmetic number, because the mean of its divisors is an integer number (15116314035).

Almost surely, 2^120021201221 is an apocalyptic number.

It is an amenable number.

120021201221 is a deficient number, since it is larger than the sum of its proper divisors (909311059).

120021201221 is a wasteful number, since it uses less digits than its factorization.

120021201221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1675015.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 120021201221 its reverse (122102120021), we get a palindrome (242123321242).

The spelling of 120021201221 in words is "one hundred twenty billion, twenty-one million, two hundred one thousand, two hundred twenty-one".