1220321152 has 16 divisors (see below), whose sum is σ = 2431108800. Its totient is φ = 610160512.

The previous prime is 1220321101. The next prime is 1220321177. The reversal of 1220321152 is 2511230221.

It is a tau number, because it is divible by the number of its divisors (16).

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, 4766752 + ... + 4767007.

It is an arithmetic number, because the mean of its divisors is an integer number (151944300).

Almost surely, 2^1220321152 is an apocalyptic number.

It is an amenable number.

1220321152 is a deficient number, since it is larger than the sum of its proper divisors (1210787648).

1220321152 is an frugal number, since it uses more digits than its factorization.

1220321152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9533773 (or 9533761 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 1220321152 is about 34933.0953681462. The cubic root of 1220321152 is about 1068.6234816115.

Adding to 1220321152 its reverse (2511230221), we get a palindrome (3731551373).

The spelling of 1220321152 in words is "one billion, two hundred twenty million, three hundred twenty-one thousand, one hundred fifty-two".