1211111222022 has 32 divisors (see below), whose sum is σ = 2898385832160. Its totient is φ = 372649606560.

The previous prime is 1211111221987. The next prime is 1211111222023. The reversal of 1211111222022 is 2202221111121.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1211111221986 and 1211111222004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211111222023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 862614129 + ... + 862615532.

It is an arithmetic number, because the mean of its divisors is an integer number (90574557255).

Almost surely, 2^{1211111222022} is an apocalyptic number.

1211111222022 is an abundant number, since it is smaller than the sum of its proper divisors (1687274610138).

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

1211111222022 is a wasteful number, since it uses less digits than its factorization.

1211111222022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1725229685 (or 1725229679 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 1211111222022 its reverse (2202221111121), we get a palindrome (3413332333143).

The spelling of 1211111222022 in words is "one trillion, two hundred eleven billion, one hundred eleven million, two hundred twenty-two thousand, twenty-two".