1221322032 has 60 divisors (see below), whose sum is σ = 3906295120. Its totient is φ = 348948864.

The previous prime is 1221322027. The next prime is 1221322061. The reversal of 1221322032 is 2302231221.

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

It is a junction number, because it is equal to n+sod(n) for n = 1221321996 and 1221322014.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 604807 + ... + 606822.

Almost surely, 2^1221322032 is an apocalyptic number.

1221322032 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1221322032 is an abundant number, since it is smaller than the sum of its proper divisors (2684973088).

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

1221322032 is a wasteful number, since it uses less digits than its factorization.

1221322032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1211650 (or 1211641 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 1221322032 is about 34947.4181020573. The cubic root of 1221322032 is about 1068.9155554346.

Adding to 1221322032 its reverse (2302231221), we get a palindrome (3523553253).

The spelling of 1221322032 in words is "one billion, two hundred twenty-one million, three hundred twenty-two thousand, thirty-two".