220021221210 has 32 divisors (see below), whose sum is σ = 603486778752. Its totient is φ = 50290564800.

The previous prime is 220021221197. The next prime is 220021221239. The reversal of 220021221210 is 12122120022.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 220021221210.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 523859841 + ... + 523860260.

It is an arithmetic number, because the mean of its divisors is an integer number (18858961836).

Almost surely, 2^220021221210 is an apocalyptic number.

220021221210 is an abundant number, since it is smaller than the sum of its proper divisors (383465557542).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

220021221210 is a wasteful number, since it uses less digits than its factorization.

220021221210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1047720118.

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

Adding to 220021221210 its reverse (12122120022), we get a palindrome (232143341232).

The spelling of 220021221210 in words is "two hundred twenty billion, twenty-one million, two hundred twenty-one thousand, two hundred ten".