1221241432 has 8 divisors (see below), whose sum is σ = 2289827700. Its totient is φ = 610620712.

The previous prime is 1221241403. The next prime is 1221241433. The reversal of 1221241432 is 2341421221.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221241433) 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 as a sum of consecutive naturals, namely, 76327582 + ... + 76327597.

Almost surely, 2^1221241432 is an apocalyptic number.

It is an amenable number.

1221241432 is a deficient number, since it is larger than the sum of its proper divisors (1068586268).

1221241432 is a wasteful number, since it uses less digits than its factorization.

1221241432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152655185 (or 152655181 counting only the distinct ones).

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

The square root of 1221241432 is about 34946.2649220199. The cubic root of 1221241432 is about 1068.8920408914.

Adding to 1221241432 its reverse (2341421221), we get a palindrome (3562662653).

The spelling of 1221241432 in words is "one billion, two hundred twenty-one million, two hundred forty-one thousand, four hundred thirty-two".