12021222221212 has 24 divisors (see below), whose sum is σ = 21114290630160. Its totient is φ = 5988570234240.

The previous prime is 12021222221143. The next prime is 12021222221213. The reversal of 12021222221212 is 21212222212021.

It is a super-2 number, since 2×12021222221212² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12021222221213) 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, 19688739 + ... + 20290117.

It is an arithmetic number, because the mean of its divisors is an integer number (879762109590).

Almost surely, 2^{12021222221212} is an apocalyptic number.

It is an amenable number.

12021222221212 is a deficient number, since it is larger than the sum of its proper divisors (9093068408948).

12021222221212 is a wasteful number, since it uses less digits than its factorization.

12021222221212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 619701 (or 619699 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 12021222221212 its reverse (21212222212021), we get a palindrome (33233444433233).

The spelling of 12021222221212 in words is "twelve trillion, twenty-one billion, two hundred twenty-two million, two hundred twenty-one thousand, two hundred twelve".