22120138 has 4 divisors (see below), whose sum is σ = 33180210. Its totient is φ = 11060068.

The previous prime is 22120099. The next prime is 22120151. The reversal of 22120138 is 83102122.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83102122 = 2 ⋅41551061.

It can be written as a sum of positive squares in only one way, i.e., 12981609 + 9138529 = 3603^2 + 3023^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5530033 + ... + 5530036.

Almost surely, 2^22120138 is an apocalyptic number.

22120138 is a deficient number, since it is larger than the sum of its proper divisors (11060072).

22120138 is a wasteful number, since it uses less digits than its factorization.

22120138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11060071.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 22120138 is about 4703.2050773914. The cubic root of 22120138 is about 280.7130550237.

The spelling of 22120138 in words is "twenty-two million, one hundred twenty thousand, one hundred thirty-eight".