12211220021222 has 4 divisors (see below), whose sum is σ = 18316830031836. Its totient is φ = 6105610010610.

The previous prime is 12211220021141. The next prime is 12211220021243. The reversal of 12211220021222 is 22212002211221.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×12211220021222² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12211220021194 and 12211220021203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3052805005304 + ... + 3052805005307.

It is an arithmetic number, because the mean of its divisors is an integer number (4579207507959).

Almost surely, 2^{12211220021222} is an apocalyptic number.

12211220021222 is a deficient number, since it is larger than the sum of its proper divisors (6105610010614).

12211220021222 is an equidigital number, since it uses as much as digits as its factorization.

12211220021222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6105610010613.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 12211220021222 its reverse (22212002211221), we get a palindrome (34423222232443).

The spelling of 12211220021222 in words is "twelve trillion, two hundred eleven billion, two hundred twenty million, twenty-one thousand, two hundred twenty-two".