220021212220 has 24 divisors (see below), whose sum is σ = 462055456800. Its totient is φ = 88006406592.

The previous prime is 220021212193. The next prime is 220021212247. The reversal of 220021212220 is 22212120022.

It is an interprime number because it is at equal distance from previous prime (220021212193) and next prime (220021212247).

It is a junction number, because it is equal to n+sod(n) for n = 220021212194 and 220021212203.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 962121 + ... + 1168639.

It is an arithmetic number, because the mean of its divisors is an integer number (19252310700).

Almost surely, 2^220021212220 is an apocalyptic number.

220021212220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220021212220 is an abundant number, since it is smaller than the sum of its proper divisors (242034244580).

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

220021212220 is a wasteful number, since it uses less digits than its factorization.

220021212220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259797 (or 259795 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 220021212220 its reverse (22212120022), we get a palindrome (242233332242).

The spelling of 220021212220 in words is "two hundred twenty billion, twenty-one million, two hundred twelve thousand, two hundred twenty".