1220601312 has 120 divisors (see below), whose sum is σ = 4102637616. Its totient is φ = 348738048.

The previous prime is 1220601259. The next prime is 1220601341. The reversal of 1220601312 is 2131060221.

1220601312 is a `hidden beast` number, since 12 + 20 + 601 + 31 + 2 = 666.

It is a super-2 number, since 2×1220601312² = 2979735125712242688, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 15493 + ... + 51780.

Almost surely, 2^1220601312 is an apocalyptic number.

1220601312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1220601312 is an abundant number, since it is smaller than the sum of its proper divisors (2882036304).

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

1220601312 is an equidigital number, since it uses as much as digits as its factorization.

1220601312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67302 (or 67285 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 1220601312 is about 34937.1050890024. The cubic root of 1220601312 is about 1068.7052531589.

Adding to 1220601312 its reverse (2131060221), we get a palindrome (3351661533).

The spelling of 1220601312 in words is "one billion, two hundred twenty million, six hundred one thousand, three hundred twelve".