1220223212 has 96 divisors (see below), whose sum is σ = 2548288512. Its totient is φ = 505967616.

The previous prime is 1220223203. The next prime is 1220223217. The reversal of 1220223212 is 2123220221.

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

It is not an unprimeable number, because it can be changed into a prime (1220223217) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1786223 + ... + 1786905.

It is an arithmetic number, because the mean of its divisors is an integer number (26544672).

Almost surely, 2^1220223212 is an apocalyptic number.

It is an amenable number.

1220223212 is an abundant number, since it is smaller than the sum of its proper divisors (1328065300).

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

1220223212 is a wasteful number, since it uses less digits than its factorization.

1220223212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 807 (or 805 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 1220223212 is about 34931.6935174921. The cubic root of 1220223212 is about 1068.5948924750.

Adding to 1220223212 its reverse (2123220221), we get a palindrome (3343443433).

The spelling of 1220223212 in words is "one billion, two hundred twenty million, two hundred twenty-three thousand, two hundred twelve".