221232431044 has 12 divisors (see below), whose sum is σ = 387212373184. Its totient is φ = 110600324424.

The previous prime is 221232431033. The next prime is 221232431053. The reversal of 221232431044 is 440134232122.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3941424 + ... + 3997159.

Almost surely, 2^221232431044 is an apocalyptic number.

It is an amenable number.

221232431044 is a deficient number, since it is larger than the sum of its proper divisors (165979942140).

221232431044 is a wasteful number, since it uses less digits than its factorization.

221232431044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7945554 (or 7945552 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 221232431044 its reverse (440134232122), we get a palindrome (661366663166).

The spelling of 221232431044 in words is "two hundred twenty-one billion, two hundred thirty-two million, four hundred thirty-one thousand, forty-four".