1220402222 has 16 divisors (see below), whose sum is σ = 2087385552. Its totient is φ = 530129280.

The previous prime is 1220402207. The next prime is 1220402233. The reversal of 1220402222 is 2222040221.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a self number, because there is not a number n which added to its sum of digits gives 1220402222.

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, 1380104 + ... + 1380987.

It is an arithmetic number, because the mean of its divisors is an integer number (130461597).

Almost surely, 2^1220402222 is an apocalyptic number.

1220402222 is a deficient number, since it is larger than the sum of its proper divisors (866983330).

1220402222 is a wasteful number, since it uses less digits than its factorization.

1220402222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2761123.

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 1220402222 is about 34934.2557098330. The cubic root of 1220402222 is about 1068.6471451603.

Adding to 1220402222 its reverse (2222040221), we get a palindrome (3442442443).

The spelling of 1220402222 in words is "one billion, two hundred twenty million, four hundred two thousand, two hundred twenty-two".