1220311442 has 64 divisors (see below), whose sum is σ = 2340783360. Its totient is φ = 464486400.

The previous prime is 1220311429. The next prime is 1220311447. The reversal of 1220311442 is 2441130221.

It is a super-2 number, since 2×1220311442² = 2978320030952238728, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1220311447) 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, 1903442 + ... + 1904082.

It is an arithmetic number, because the mean of its divisors is an integer number (36574740).

Almost surely, 2^1220311442 is an apocalyptic number.

1220311442 is a deficient number, since it is larger than the sum of its proper divisors (1120471918).

1220311442 is a wasteful number, since it uses less digits than its factorization.

1220311442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1107.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 1220311442 is about 34932.9563879154. The cubic root of 1220311442 is about 1068.6206472861.

Adding to 1220311442 its reverse (2441130221), we get a palindrome (3661441663).

The spelling of 1220311442 in words is "one billion, two hundred twenty million, three hundred eleven thousand, four hundred forty-two".