1221324032 has 36 divisors (see below), whose sum is σ = 2442823236. Its totient is φ = 609423360.

The previous prime is 1221323927. The next prime is 1221324079. The reversal of 1221324032 is 2304231221.

It can be written as a sum of positive squares in 2 ways, for example, as 248882176 + 972441856 = 15776^2 + 31184^2 .

It is a super-2 number, since 2×1221324032² = 2983264782281474048, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1221323995 and 1221324013.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 128798 + ... + 137954.

It is an arithmetic number, because the mean of its divisors is an integer number (67856201).

Almost surely, 2^1221324032 is an apocalyptic number.

It is an amenable number.

1221324032 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

1221324032 is an frugal number, since it uses more digits than its factorization.

1221324032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9694 (or 9680 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 1221324032 is about 34947.4467164627. The cubic root of 1221324032 is about 1068.9161389088.

Adding to 1221324032 its reverse (2304231221), we get a palindrome (3525555253).

The spelling of 1221324032 in words is "one billion, two hundred twenty-one million, three hundred twenty-four thousand, thirty-two".