181122222001 has 8 divisors (see below), whose sum is σ = 219173109120. Its totient is φ = 146115405888.

The previous prime is 181122221989. The next prime is 181122222007. The reversal of 181122222001 is 100222221181.

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

It is a cyclic number.

It is not a de Polignac number, because 181122222001 - 2¹¹ = 181122219953 is a prime.

It is not an unprimeable number, because it can be changed into a prime (181122222007) 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, 761017621 + ... + 761017858.

It is an arithmetic number, because the mean of its divisors is an integer number (27396638640).

Almost surely, 2^181122222001 is an apocalyptic number.

It is an amenable number.

181122222001 is a deficient number, since it is larger than the sum of its proper divisors (38050887119).

181122222001 is a wasteful number, since it uses less digits than its factorization.

181122222001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1522035503.

The product of its (nonzero) digits is 256, while the sum is 22.

Adding to 181122222001 its reverse (100222221181), we get a palindrome (281344443182).

The spelling of 181122222001 in words is "one hundred eighty-one billion, one hundred twenty-two million, two hundred twenty-two thousand, one".