22221201101212 has 24 divisors (see below), whose sum is σ = 39126128942096. Its totient is φ = 11042308706688.

The previous prime is 22221201101161. The next prime is 22221201101213. The reversal of 22221201101212 is 21210110212222.

It is a self number, because there is not a number n which added to its sum of digits gives 22221201101212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22221201101213) 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, 81688258 + ... + 81959830.

Almost surely, 2^{22221201101212} is an apocalyptic number.

It is an amenable number.

22221201101212 is a deficient number, since it is larger than the sum of its proper divisors (16904927840884).

22221201101212 is a wasteful number, since it uses less digits than its factorization.

22221201101212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 397237 (or 397235 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 22221201101212 its reverse (21210110212222), we get a palindrome (43431311313434).

The spelling of 22221201101212 in words is "twenty-two trillion, two hundred twenty-one billion, two hundred one million, one hundred one thousand, two hundred twelve".