1220000022 has 32 divisors (see below), whose sum is σ = 2715379200. Its totient is φ = 406026504.

The previous prime is 1219999993. The next prime is 1220000027. The reversal of 1220000022 is 2200000221.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 1219999959 and 1220000013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220000027) 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, 17479 + ... + 52397.

It is an arithmetic number, because the mean of its divisors is an integer number (84855600).

Almost surely, 2^1220000022 is an apocalyptic number.

1220000022 is an abundant number, since it is smaller than the sum of its proper divisors (1495379178).

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

1220000022 is a wasteful number, since it uses less digits than its factorization.

1220000022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35577 (or 35571 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

The square root of 1220000022 is about 34928.4987080750. The cubic root of 1220000022 is about 1068.5297365717.

Adding to 1220000022 its reverse (2200000221), we get a palindrome (3420000243).

The spelling of 1220000022 in words is "one billion, two hundred twenty million, twenty-two", and thus it is an aban number.