1122121222222 has 64 divisors (see below), whose sum is σ = 2264378457600. Its totient is φ = 402766865280.

The previous prime is 1122121222213. The next prime is 1122121222331. The reversal of 1122121222222 is 2222221212211.

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

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 = 1122121222193 and 1122121222202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 468429 + ... + 1569607.

It is an arithmetic number, because the mean of its divisors is an integer number (35380913400).

Almost surely, 2^{1122121222222} is an apocalyptic number.

1122121222222 is an abundant number, since it is smaller than the sum of its proper divisors (1142257235378).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1122121222222 is a wasteful number, since it uses less digits than its factorization.

1122121222222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1101721.

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

Adding to 1122121222222 its reverse (2222221212211), we get a palindrome (3344342434433).

The spelling of 1122121222222 in words is "one trillion, one hundred twenty-two billion, one hundred twenty-one million, two hundred twenty-two thousand, two hundred twenty-two".