22103212 has 6 divisors (see below), whose sum is σ = 38680628. Its totient is φ = 11051604.

The previous prime is 22103209. The next prime is 22103219. The reversal of 22103212 is 21230122.

It is a junction number, because it is equal to n+sod(n) for n = 22103192 and 22103201.

It is not an unprimeable number, because it can be changed into a prime (22103219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2762898 + ... + 2762905.

Almost surely, 2^22103212 is an apocalyptic number.

It is an amenable number.

22103212 is a deficient number, since it is larger than the sum of its proper divisors (16577416).

22103212 is a wasteful number, since it uses less digits than its factorization.

22103212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5525807 (or 5525805 counting only the distinct ones).

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

The square root of 22103212 is about 4701.4053218160. The cubic root of 22103212 is about 280.6414376047.

Adding to 22103212 its reverse (21230122), we get a palindrome (43333334).

The spelling of 22103212 in words is "twenty-two million, one hundred three thousand, two hundred twelve".