221423221222434 has 192 divisors, whose sum is σ = 599390545628160. Its totient is φ = 57391457040000.

The previous prime is 221423221222367. The next prime is 221423221222529. The reversal of 221423221222434 is 434222122324122.

It is a happy number.

221423221222434 is a `hidden beast` number, since 2 + 2 + 1 + 4 + 2 + 3 + 2 + 212 + 2 + 2 + 434 = 666.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1425782329 + ... + 1425937619.

It is an arithmetic number, because the mean of its divisors is an integer number (3121825758480).

Almost surely, 2^{221423221222434} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221423221222434, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (299695272814080).

221423221222434 is an abundant number, since it is smaller than the sum of its proper divisors (377967324405726).

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

221423221222434 is a wasteful number, since it uses less digits than its factorization.

221423221222434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157477 (or 157474 counting only the distinct ones).

The product of its digits is 147456, while the sum is 36.

Adding to 221423221222434 its reverse (434222122324122), we get a palindrome (655645343546556).

The spelling of 221423221222434 in words is "two hundred twenty-one trillion, four hundred twenty-three billion, two hundred twenty-one million, two hundred twenty-two thousand, four hundred thirty-four".