22161081442 has 16 divisors (see below), whose sum is σ = 35363833632. Its totient is φ = 10379315520.

The previous prime is 22161081427. The next prime is 22161081443. The reversal of 22161081442 is 24418016122.

It is a super-2 number, since 2×22161081442² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (22161081443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1537368 + ... + 1551715.

It is an arithmetic number, because the mean of its divisors is an integer number (2210239602).

Almost surely, 2^22161081442 is an apocalyptic number.

22161081442 is a deficient number, since it is larger than the sum of its proper divisors (13202752190).

22161081442 is a wasteful number, since it uses less digits than its factorization.

22161081442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3089313.

The product of its (nonzero) digits is 6144, while the sum is 31.

Adding to 22161081442 its reverse (24418016122), we get a palindrome (46579097564).

The spelling of 22161081442 in words is "twenty-two billion, one hundred sixty-one million, eighty-one thousand, four hundred forty-two".