1221113120122 has 16 divisors (see below), whose sum is σ = 2097449435520. Its totient is φ = 522306029808.

The previous prime is 1221113120099. The next prime is 1221113120219. The reversal of 1221113120122 is 2210213111221.

It is a super-2 number, since 2×1221113120122² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1221113120122.

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, 85672998 + ... + 85687249.

It is an arithmetic number, because the mean of its divisors is an integer number (131090589720).

Almost surely, 2^{1221113120122} is an apocalyptic number.

1221113120122 is a deficient number, since it is larger than the sum of its proper divisors (876336315398).

1221113120122 is a wasteful number, since it uses less digits than its factorization.

1221113120122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171360765.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 1221113120122 its reverse (2210213111221), we get a palindrome (3431326231343).

The spelling of 1221113120122 in words is "one trillion, two hundred twenty-one billion, one hundred thirteen million, one hundred twenty thousand, one hundred twenty-two".