1111221212022 has 16 divisors (see below), whose sum is σ = 2469380471280. Its totient is φ = 370407070656.

The previous prime is 1111221211979. The next prime is 1111221212083. The reversal of 1111221212022 is 2202121221111.

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 = 1111221211986 and 1111221212004.

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, 10289085243 + ... + 10289085350.

It is an arithmetic number, because the mean of its divisors is an integer number (154336279455).

Almost surely, 2^{1111221212022} is an apocalyptic number.

1111221212022 is an abundant number, since it is smaller than the sum of its proper divisors (1358159259258).

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

1111221212022 is a wasteful number, since it uses less digits than its factorization.

1111221212022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20578170604 (or 20578170598 counting only the distinct ones).

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

Adding to 1111221212022 its reverse (2202121221111), we get a palindrome (3313342433133).

The spelling of 1111221212022 in words is "one trillion, one hundred eleven billion, two hundred twenty-one million, two hundred twelve thousand, twenty-two".