1212222221122 has 8 divisors (see below), whose sum is σ = 1983636361872. Its totient is φ = 551010100500.

The previous prime is 1212222221113. The next prime is 1212222221131. The reversal of 1212222221122 is 2211222222121.

It is an interprime number because it is at equal distance from previous prime (1212222221113) and next prime (1212222221131).

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

It is a Harshad number since it is a multiple of its sum of digits (22), and also a Moran number because the ratio is a prime number: 55101010051 = 1212222221122 / (1 + 2 + 1 + 2 + 2 + 2 + 2 + 2 + 2 + 1 + 1 + 2 + 2).

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

It is a junction number, because it is equal to n+sod(n) for n = 1212222221093 and 1212222221102.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27550505004 + ... + 27550505047.

It is an arithmetic number, because the mean of its divisors is an integer number (247954545234).

Almost surely, 2^{1212222221122} is an apocalyptic number.

1212222221122 is a deficient number, since it is larger than the sum of its proper divisors (771414140750).

1212222221122 is a wasteful number, since it uses less digits than its factorization.

1212222221122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55101010064.

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

Adding to 1212222221122 its reverse (2211222222121), we get a palindrome (3423444443243).

Subtracting 1212222221122 from its reverse (2211222222121), we obtain a palindrome (999000000999).

The spelling of 1212222221122 in words is "one trillion, two hundred twelve billion, two hundred twenty-two million, two hundred twenty-one thousand, one hundred twenty-two".