1220222120 has 32 divisors (see below), whose sum is σ = 2956693320. Its totient is φ = 450543360.

The previous prime is 1220222119. The next prime is 1220222173. The reversal of 1220222120 is 212220221.

It can be written as a sum of positive squares in 4 ways, for example, as 953944996 + 266277124 = 30886^2 + 16318^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1220222095 and 1220222104.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1172771 + ... + 1173810.

Almost surely, 2^1220222120 is an apocalyptic number.

1220222120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220222120 is an abundant number, since it is smaller than the sum of its proper divisors (1736471200).

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

1220222120 is a wasteful number, since it uses less digits than its factorization.

1220222120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2346605 (or 2346601 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 1220222120 is about 34931.6778869839. The cubic root of 1220222120 is about 1068.5945737066.

Adding to 1220222120 its reverse (212220221), we get a palindrome (1432442341).

The spelling of 1220222120 in words is "one billion, two hundred twenty million, two hundred twenty-two thousand, one hundred twenty".