122222344566 has 64 divisors (see below), whose sum is σ = 284010693120. Its totient is φ = 34341753600.

The previous prime is 122222344561. The next prime is 122222344567. The reversal of 122222344566 is 665443222221.

It is a super-2 number, since 2×122222344566² (a number of 23 digits) contains 22 as substring.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122222344561) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1655080 + ... + 1727348.

It is an arithmetic number, because the mean of its divisors is an integer number (4437667080).

Almost surely, 2^122222344566 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 122222344566, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (142005346560).

122222344566 is an abundant number, since it is smaller than the sum of its proper divisors (161788348554).

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

122222344566 is a wasteful number, since it uses less digits than its factorization.

122222344566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72949.

The product of its digits is 276480, while the sum is 39.

Adding to 122222344566 its reverse (665443222221), we get a palindrome (787665566787).

The spelling of 122222344566 in words is "one hundred twenty-two billion, two hundred twenty-two million, three hundred forty-four thousand, five hundred sixty-six".