22221001001212 has 24 divisors (see below), whose sum is σ = 41954599890896. Its totient is φ = 10237097340288.

The previous prime is 22221001001189. The next prime is 22221001001219. The reversal of 22221001001212 is 21210010012222.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22221001001219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 390581193 + ... + 390638080.

Almost surely, 2^{22221001001212} is an apocalyptic number.

It is an amenable number.

22221001001212 is a deficient number, since it is larger than the sum of its proper divisors (19733598889684).

22221001001212 is a wasteful number, since it uses less digits than its factorization.

22221001001212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 781219837 (or 781219835 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 22221001001212 its reverse (21210010012222), we get a palindrome (43431011013434).

The spelling of 22221001001212 in words is "twenty-two trillion, two hundred twenty-one billion, one million, one thousand, two hundred twelve".