12121100222 has 32 divisors (see below), whose sum is σ = 22855405824. Its totient is φ = 4722499320.

The previous prime is 12121100213. The next prime is 12121100267. The reversal of 12121100222 is 22200112121.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 12121100197 and 12121100206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 306608 + ... + 343875.

It is an arithmetic number, because the mean of its divisors is an integer number (714231432).

Almost surely, 2^12121100222 is an apocalyptic number.

12121100222 is a deficient number, since it is larger than the sum of its proper divisors (10734305602).

12121100222 is an equidigital number, since it uses as much as digits as its factorization.

12121100222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 650525 (or 650503 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 12121100222 its reverse (22200112121), we get a palindrome (34321212343).

The spelling of 12121100222 in words is "twelve billion, one hundred twenty-one million, one hundred thousand, two hundred twenty-two".