220021001222 has 24 divisors (see below), whose sum is σ = 363603746016. Its totient is φ = 99777458000.

The previous prime is 220021001219. The next prime is 220021001227. The reversal of 220021001222 is 222100120022.

It is a junction number, because it is equal to n+sod(n) for n = 220021001197 and 220021001206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220021001227) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 950429 + ... + 1159032.

It is an arithmetic number, because the mean of its divisors is an integer number (15150156084).

Almost surely, 2^220021001222 is an apocalyptic number.

220021001222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

220021001222 is a deficient number, since it is larger than the sum of its proper divisors (143582744794).

220021001222 is a wasteful number, since it uses less digits than its factorization.

220021001222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2109916 (or 2109905 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 220021001222 its reverse (222100120022), we get a palindrome (442121121244).

The spelling of 220021001222 in words is "two hundred twenty billion, twenty-one million, one thousand, two hundred twenty-two".