22123042042 has 4 divisors (see below), whose sum is σ = 33184563066. Its totient is φ = 11061521020.

The previous prime is 22123042013. The next prime is 22123042043. The reversal of 22123042042 is 24024032122.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 20946483441 + 1176558601 = 144729^2 + 34301^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (22123042043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5530760509 + ... + 5530760512.

Almost surely, 2^22123042042 is an apocalyptic number.

22123042042 is a deficient number, since it is larger than the sum of its proper divisors (11061521024).

22123042042 is a wasteful number, since it uses less digits than its factorization.

22123042042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11061521023.

The product of its (nonzero) digits is 1536, while the sum is 22.

Adding to 22123042042 its reverse (24024032122), we get a palindrome (46147074164).

The spelling of 22123042042 in words is "twenty-two billion, one hundred twenty-three million, forty-two thousand, forty-two".