1220022221 has 8 divisors (see below), whose sum is σ = 1409223744. Its totient is φ = 1043869120.

The previous prime is 1220022203. The next prime is 1220022247. The reversal of 1220022221 is 1222200221.

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

It is a cyclic number.

It is not a de Polignac number, because 1220022221 - 2¹⁸ = 1219760077 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1220022196 and 1220022205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220022121) 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, 3261905 + ... + 3262278.

It is an arithmetic number, because the mean of its divisors is an integer number (176152968).

Almost surely, 2^1220022221 is an apocalyptic number.

1220022221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1220022221 is a deficient number, since it is larger than the sum of its proper divisors (189201523).

1220022221 is a wasteful number, since it uses less digits than its factorization.

1220022221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6524211.

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

The square root of 1220022221 is about 34928.8164843872. The cubic root of 1220022221 is about 1068.5362174863.

Adding to 1220022221 its reverse (1222200221), we get a palindrome (2442222442).

The spelling of 1220022221 in words is "one billion, two hundred twenty million, twenty-two thousand, two hundred twenty-one".