220221210021 has 8 divisors (see below), whose sum is σ = 293655433344. Its totient is φ = 146800563360.

The previous prime is 220221210017. The next prime is 220221210043. The reversal of 220221210021 is 120012122022.

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

It is not a de Polignac number, because 220221210021 - 2² = 220221210017 is a prime.

It is a super-2 number, since 2×220221210021² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220221210421) 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, 3356256 + ... + 3421241.

It is an arithmetic number, because the mean of its divisors is an integer number (36706929168).

Almost surely, 2^220221210021 is an apocalyptic number.

It is an amenable number.

220221210021 is a deficient number, since it is larger than the sum of its proper divisors (73434223323).

220221210021 is a wasteful number, since it uses less digits than its factorization.

220221210021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6788331.

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

Adding to 220221210021 its reverse (120012122022), we get a palindrome (340233332043).

The spelling of 220221210021 in words is "two hundred twenty billion, two hundred twenty-one million, two hundred ten thousand, twenty-one".