1220501312 has 14 divisors (see below), whose sum is σ = 2421932418. Its totient is φ = 610250624.

The previous prime is 1220501291. The next prime is 1220501323. The reversal of 1220501312 is 2131050221.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1182259456 + 38241856 = 34384^2 + 6184^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9535103 + ... + 9535230.

Almost surely, 2^1220501312 is an apocalyptic number.

It is an amenable number.

1220501312 is a deficient number, since it is larger than the sum of its proper divisors (1201431106).

1220501312 is an equidigital number, since it uses as much as digits as its factorization.

1220501312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19070345 (or 19070335 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 1220501312 is about 34935.6739164997. The cubic root of 1220501312 is about 1068.6760671495.

Adding to 1220501312 its reverse (2131050221), we get a palindrome (3351551533).

The spelling of 1220501312 in words is "one billion, two hundred twenty million, five hundred one thousand, three hundred twelve".