1221412432 has 20 divisors (see below), whose sum is σ = 2399819616. Its totient is φ = 602104160.

The previous prime is 1221412393. The next prime is 1221412433. The reversal of 1221412432 is 2342141221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221412433) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 536458 + ... + 538729.

Almost surely, 2^1221412432 is an apocalyptic number.

It is an amenable number.

1221412432 is a deficient number, since it is larger than the sum of its proper divisors (1178407184).

1221412432 is a wasteful number, since it uses less digits than its factorization.

1221412432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1075266 (or 1075260 counting only the distinct ones).

The product of its digits is 768, while the sum is 22.

The square root of 1221412432 is about 34948.7114497802. The cubic root of 1221412432 is about 1068.9419278353.

Adding to 1221412432 its reverse (2342141221), we get a palindrome (3563553653).

The spelling of 1221412432 in words is "one billion, two hundred twenty-one million, four hundred twelve thousand, four hundred thirty-two".