12212121022 has 8 divisors (see below), whose sum is σ = 18348066216. Its totient is φ = 6096098952.

The previous prime is 12212121013. The next prime is 12212121023. The reversal of 12212121022 is 22012121221.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 12212120987 and 12212121005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12212121023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4979248 + ... + 4981699.

It is an arithmetic number, because the mean of its divisors is an integer number (2293508277).

Almost surely, 2^12212121022 is an apocalyptic number.

12212121022 is a deficient number, since it is larger than the sum of its proper divisors (6135945194).

12212121022 is an equidigital number, since it uses as much as digits as its factorization.

12212121022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9961562.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 12212121022 its reverse (22012121221), we get a palindrome (34224242243).

The spelling of 12212121022 in words is "twelve billion, two hundred twelve million, one hundred twenty-one thousand, twenty-two".