1221314432 has 32 divisors (see below), whose sum is σ = 2620251480. Its totient is φ = 563682816.

The previous prime is 1221314431. The next prime is 1221314447. The reversal of 1221314432 is 2344131221.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×1221314432² = 2983217883622965248, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1221314398 and 1221314407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221314431) by changing a digit.

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, 365318 + ... + 368645.

Almost surely, 2^1221314432 is an apocalyptic number.

It is an amenable number.

1221314432 is an abundant number, since it is smaller than the sum of its proper divisors (1398937048).

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

1221314432 is an equidigital number, since it uses as much as digits as its factorization.

1221314432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 733990 (or 733978 counting only the distinct ones).

The product of its digits is 1152, while the sum is 23.

The square root of 1221314432 is about 34947.3093671029. The cubic root of 1221314432 is about 1068.9133382265.

Adding to 1221314432 its reverse (2344131221), we get a palindrome (3565445653).

The spelling of 1221314432 in words is "one billion, two hundred twenty-one million, three hundred fourteen thousand, four hundred thirty-two".