22120312 has 8 divisors (see below), whose sum is σ = 41475600. Its totient is φ = 11060152.

The previous prime is 22120303. The next prime is 22120331. The reversal of 22120312 is 21302122.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 22120292 and 22120301.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1382512 + ... + 1382527.

It is an arithmetic number, because the mean of its divisors is an integer number (5184450).

Almost surely, 2^22120312 is an apocalyptic number.

It is an amenable number.

22120312 is a deficient number, since it is larger than the sum of its proper divisors (19355288).

22120312 is a wasteful number, since it uses less digits than its factorization.

22120312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2765045 (or 2765041 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 22120312 is about 4703.2235753789. The cubic root of 22120312 is about 280.7137910641.

Adding to 22120312 its reverse (21302122), we get a palindrome (43422434).

The spelling of 22120312 in words is "twenty-two million, one hundred twenty thousand, three hundred twelve".