221430432011 has 4 divisors (see below), whose sum is σ = 221443530432. Its totient is φ = 221417333592.

The previous prime is 221430431939. The next prime is 221430432037. The reversal of 221430432011 is 110234034122.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 110234034122 = 2 ⋅55117017061.

It is a cyclic number.

It is not a de Polignac number, because 221430432011 - 2³⁰ = 220356690187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221430431011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6523820 + ... + 6557673.

It is an arithmetic number, because the mean of its divisors is an integer number (55360882608).

Almost surely, 2^221430432011 is an apocalyptic number.

221430432011 is a deficient number, since it is larger than the sum of its proper divisors (13098421).

221430432011 is a wasteful number, since it uses less digits than its factorization.

221430432011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13098420.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 221430432011 its reverse (110234034122), we get a palindrome (331664466133).

The spelling of 221430432011 in words is "two hundred twenty-one billion, four hundred thirty million, four hundred thirty-two thousand, eleven".