12222021212 has 12 divisors (see below), whose sum is σ = 21532085400. Its totient is φ = 6069996816.

The previous prime is 12222021173. The next prime is 12222021257. The reversal of 12222021212 is 21212022221.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10252778 + ... + 10253969.

It is an arithmetic number, because the mean of its divisors is an integer number (1794340450).

Almost surely, 2^12222021212 is an apocalyptic number.

It is an amenable number.

12222021212 is a deficient number, since it is larger than the sum of its proper divisors (9310064188).

12222021212 is a wasteful number, since it uses less digits than its factorization.

12222021212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20506900 (or 20506898 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 12222021212 its reverse (21212022221), we get a palindrome (33434043433).

The spelling of 12222021212 in words is "twelve billion, two hundred twenty-two million, twenty-one thousand, two hundred twelve".