221432042124 has 72 divisors (see below), whose sum is σ = 564465676320. Its totient is φ = 73188502272.

The previous prime is 221432042123. The next prime is 221432042137. The reversal of 221432042124 is 421240234122.

It is a happy number.

221432042124 is a `hidden beast` number, since 2 + 214 + 3 + 2 + 0 + 421 + 24 = 666.

It is not an unprimeable number, because it can be changed into a prime (221432042123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2413882 + ... + 2503934.

It is an arithmetic number, because the mean of its divisors is an integer number (7839801060).

Almost surely, 2^221432042124 is an apocalyptic number.

It is an amenable number.

221432042124 is an abundant number, since it is smaller than the sum of its proper divisors (343033634196).

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

221432042124 is a wasteful number, since it uses less digits than its factorization.

221432042124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90639 (or 90634 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

Adding to 221432042124 its reverse (421240234122), we get a palindrome (642672276246).

The spelling of 221432042124 in words is "two hundred twenty-one billion, four hundred thirty-two million, forty-two thousand, one hundred twenty-four".