22161181142 has 8 divisors (see below), whose sum is σ = 33255221016. Its totient is φ = 11076107472.

The previous prime is 22161181127. The next prime is 22161181241. The reversal of 22161181142 is 24118116122.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×22161181142² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2235368 + ... + 2245259.

It is an arithmetic number, because the mean of its divisors is an integer number (4156902627).

Almost surely, 2^22161181142 is an apocalyptic number.

22161181142 is a deficient number, since it is larger than the sum of its proper divisors (11094039874).

22161181142 is a wasteful number, since it uses less digits than its factorization.

22161181142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4483102.

The product of its digits is 1536, while the sum is 29.

Adding to 22161181142 its reverse (24118116122), we get a palindrome (46279297264).

The spelling of 22161181142 in words is "twenty-two billion, one hundred sixty-one million, one hundred eighty-one thousand, one hundred forty-two".