121111221121222 has 16 divisors (see below), whose sum is σ = 182256119138160. Its totient is φ = 60359200267392.

The previous prime is 121111221121201. The next prime is 121111221121279. The reversal of 121111221121222 is 222121122111121.

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 = 121111221121193 and 121111221121202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8168154 + ... + 17576722.

It is an arithmetic number, because the mean of its divisors is an integer number (11391007446135).

Almost surely, 2^{121111221121222} is an apocalyptic number.

121111221121222 is a deficient number, since it is larger than the sum of its proper divisors (61144898016938).

121111221121222 is a wasteful number, since it uses less digits than its factorization.

121111221121222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9429447.

The product of its digits is 128, while the sum is 22.

Adding to 121111221121222 its reverse (222121122111121), we get a palindrome (343232343232343).

The spelling of 121111221121222 in words is "one hundred twenty-one trillion, one hundred eleven billion, two hundred twenty-one million, one hundred twenty-one thousand, two hundred twenty-two".