12220022221 has 16 divisors (see below), whose sum is σ = 13602790080. Its totient is φ = 10883192320.

The previous prime is 12220022203. The next prime is 12220022237. The reversal of 12220022221 is 12222002221.

It is not a de Polignac number, because 12220022221 - 2¹⁷ = 12219891149 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12220022195 and 12220022204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12220022251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 382845 + ... + 413533.

It is an arithmetic number, because the mean of its divisors is an integer number (850174380).

Almost surely, 2^12220022221 is an apocalyptic number.

12220022221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12220022221 is a deficient number, since it is larger than the sum of its proper divisors (1382767859).

12220022221 is a wasteful number, since it uses less digits than its factorization.

12220022221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31436.

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

Adding to 12220022221 its reverse (12222002221), we get a palindrome (24442024442).

The spelling of 12220022221 in words is "twelve billion, two hundred twenty million, twenty-two thousand, two hundred twenty-one".