221232431422 has 4 divisors (see below), whose sum is σ = 331848647136. Its totient is φ = 110616215710.

The previous prime is 221232431383. The next prime is 221232431437. The reversal of 221232431422 is 224134232122.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55308107854 + ... + 55308107857.

It is an arithmetic number, because the mean of its divisors is an integer number (82962161784).

Almost surely, 2^221232431422 is an apocalyptic number.

221232431422 is a deficient number, since it is larger than the sum of its proper divisors (110616215714).

221232431422 is a wasteful number, since it uses less digits than its factorization.

221232431422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110616215713.

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

Adding to 221232431422 its reverse (224134232122), we get a palindrome (445366663544).

The spelling of 221232431422 in words is "two hundred twenty-one billion, two hundred thirty-two million, four hundred thirty-one thousand, four hundred twenty-two".