1220422220 has 12 divisors (see below), whose sum is σ = 2562886704. Its totient is φ = 488168880.

The previous prime is 1220422211. The next prime is 1220422237. The reversal of 1220422220 is 222240221.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30510536 + ... + 30510575.

It is an arithmetic number, because the mean of its divisors is an integer number (213573892).

Almost surely, 2^1220422220 is an apocalyptic number.

1220422220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220422220 is an abundant number, since it is smaller than the sum of its proper divisors (1342464484).

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

1220422220 is a wasteful number, since it uses less digits than its factorization.

1220422220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61021120 (or 61021118 counting only the distinct ones).

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

The square root of 1220422220 is about 34934.5419320191. The cubic root of 1220422220 is about 1068.6529822219.

Adding to 1220422220 its reverse (222240221), we get a palindrome (1442662441).

The spelling of 1220422220 in words is "one billion, two hundred twenty million, four hundred twenty-two thousand, two hundred twenty".