221234034823 has 2 divisors, whose sum is σ = 221234034824. Its totient is φ = 221234034822.

The previous prime is 221234034799. The next prime is 221234034871. The reversal of 221234034823 is 328430432122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221234034823 - 2²¹ = 221231937671 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221234434823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110617017411 + 110617017412.

It is an arithmetic number, because the mean of its divisors is an integer number (110617017412).

Almost surely, 2^221234034823 is an apocalyptic number.

221234034823 is a deficient number, since it is larger than the sum of its proper divisors (1).

221234034823 is an equidigital number, since it uses as much as digits as its factorization.

221234034823 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 55296, while the sum is 34.

Adding to 221234034823 its reverse (328430432122), we get a palindrome (549664466945).

The spelling of 221234034823 in words is "two hundred twenty-one billion, two hundred thirty-four million, thirty-four thousand, eight hundred twenty-three".