120012200021221 has 16 divisors (see below), whose sum is σ = 121079893565440. Its totient is φ = 118946451335040.

The previous prime is 120012200021179. The next prime is 120012200021243. The reversal of 120012200021221 is 122120002210021.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 120012200021221 - 2¹⁵ = 120012199988453 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 120012200021195 and 120012200021204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120012200021321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1208812435 + ... + 1208911711.

It is an arithmetic number, because the mean of its divisors is an integer number (7567493347840).

Almost surely, 2^{120012200021221} is an apocalyptic number.

It is an amenable number.

120012200021221 is a deficient number, since it is larger than the sum of its proper divisors (1067693544219).

120012200021221 is a wasteful number, since it uses less digits than its factorization.

120012200021221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108964.

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

Adding to 120012200021221 its reverse (122120002210021), we get a palindrome (242132202231242).

The spelling of 120012200021221 in words is "one hundred twenty trillion, twelve billion, two hundred million, twenty-one thousand, two hundred twenty-one".