220012021221 has 8 divisors (see below), whose sum is σ = 293353933440. Its totient is φ = 146672394912.

The previous prime is 220012021213. The next prime is 220012021277. The reversal of 220012021221 is 122120210022.

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

It is not a de Polignac number, because 220012021221 - 2³ = 220012021213 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 220012021221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220012021321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 332640 + ... + 742073.

It is an arithmetic number, because the mean of its divisors is an integer number (36669241680).

Almost surely, 2^220012021221 is an apocalyptic number.

It is an amenable number.

220012021221 is a deficient number, since it is larger than the sum of its proper divisors (73341912219).

220012021221 is a wasteful number, since it uses less digits than its factorization.

220012021221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1142955.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 220012021221 its reverse (122120210022), we get a palindrome (342132231243).

The spelling of 220012021221 in words is "two hundred twenty billion, twelve million, twenty-one thousand, two hundred twenty-one".