921212432 has 40 divisors (see below), whose sum is σ = 2041345536. Its totient is φ = 394511616.

The previous prime is 921212431. The next prime is 921212447. The reversal of 921212432 is 234212129.

It is not an unprimeable number, because it can be changed into a prime (921212431) 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 7 ways as a sum of consecutive naturals, for example, 221153 + ... + 225279.

Almost surely, 2^921212432 is an apocalyptic number.

It is an amenable number.

921212432 is an abundant number, since it is smaller than the sum of its proper divisors (1120133104).

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

921212432 is a wasteful number, since it uses less digits than its factorization.

921212432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6135 (or 6129 counting only the distinct ones).

The product of its digits is 1728, while the sum is 26.

The square root of 921212432 is about 30351.4815453875. The cubic root of 921212432 is about 973.0158842582.

The spelling of 921212432 in words is "nine hundred twenty-one million, two hundred twelve thousand, four hundred thirty-two".