12212121022222 has 16 divisors (see below), whose sum is σ = 19985273586432. Its totient is φ = 5550463316920.

The previous prime is 12212121022219. The next prime is 12212121022237. The reversal of 12212121022222 is 22222012121221.

It is a super-2 number, since 2×12212121022222² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 12212121022193 and 12212121022202.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24789748 + ... + 25277575.

It is an arithmetic number, because the mean of its divisors is an integer number (1249079599152).

Almost surely, 2^{12212121022222} is an apocalyptic number.

12212121022222 is a deficient number, since it is larger than the sum of its proper divisors (7773152564210).

12212121022222 is a wasteful number, since it uses less digits than its factorization.

12212121022222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50078423.

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

Adding to 12212121022222 its reverse (22222012121221), we get a palindrome (34434133143443).

The spelling of 12212121022222 in words is "twelve trillion, two hundred twelve billion, one hundred twenty-one million, twenty-two thousand, two hundred twenty-two".