1220022635 has 16 divisors (see below), whose sum is σ = 1606397184. Its totient is φ = 883938432.

The previous prime is 1220022613. The next prime is 1220022659. The reversal of 1220022635 is 5362200221.

It is not a de Polignac number, because 1220022635 - 2¹⁴ = 1220006251 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1220022635.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 173627 + ... + 180516.

It is an arithmetic number, because the mean of its divisors is an integer number (100399824).

Almost surely, 2^1220022635 is an apocalyptic number.

1220022635 is a deficient number, since it is larger than the sum of its proper divisors (386374549).

1220022635 is a wasteful number, since it uses less digits than its factorization.

1220022635 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354214.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 1220022635 is about 34928.8224107255. The cubic root of 1220022635 is about 1068.5363383513.

Adding to 1220022635 its reverse (5362200221), we get a palindrome (6582222856).

The spelling of 1220022635 in words is "one billion, two hundred twenty million, twenty-two thousand, six hundred thirty-five".