22120140 has 48 divisors (see below), whose sum is σ = 70785792. Its totient is φ = 5055936.

The previous prime is 22120099. The next prime is 22120151. The reversal of 22120140 is 4102122.

It is a Harshad number since it is a multiple of its sum of digits (12).

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 in 15 ways as a sum of consecutive naturals, for example, 25914 + ... + 26753.

It is an arithmetic number, because the mean of its divisors is an integer number (1474704).

Almost surely, 2^22120140 is an apocalyptic number.

22120140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22120140 is an abundant number, since it is smaller than the sum of its proper divisors (48665652).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22120140 is a wasteful number, since it uses less digits than its factorization.

22120140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52686 (or 52684 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 22120140 is about 4703.2052900123. The cubic root of 22120140 is about 280.7130634840.

Adding to 22120140 its reverse (4102122), we get a palindrome (26222262).

The spelling of 22120140 in words is "twenty-two million, one hundred twenty thousand, one hundred forty".