12121211222 has 32 divisors (see below), whose sum is σ = 18691914240. Its totient is φ = 5893171200.

The previous prime is 12121211173. The next prime is 12121211233. The reversal of 12121211222 is 22211212121.

It is a super-2 number, since 2×12121211222² (a number of 21 digits) contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 12121211222.

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, 4577903 + ... + 4580549.

It is an arithmetic number, because the mean of its divisors is an integer number (584122320).

Almost surely, 2^12121211222 is an apocalyptic number.

12121211222 is a deficient number, since it is larger than the sum of its proper divisors (6570703018).

12121211222 is a wasteful number, since it uses less digits than its factorization.

12121211222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3116.

The product of its digits is 64, while the sum is 17.

Adding to 12121211222 its reverse (22211212121), we get a palindrome (34332423343).

The spelling of 12121211222 in words is "twelve billion, one hundred twenty-one million, two hundred eleven thousand, two hundred twenty-two".