11111221211022 has 24 divisors (see below), whose sum is σ = 24200356152960. Its totient is φ = 3684349091520.

The previous prime is 11111221210967. The next prime is 11111221211023. The reversal of 11111221211022 is 22011212211111.

It is a happy number.

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 = 11111221210986 and 11111221211004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11111221211023) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1615939147 + ... + 1615946022.

It is an arithmetic number, because the mean of its divisors is an integer number (1008348173040).

Almost surely, 2^{11111221211022} is an apocalyptic number.

11111221211022 is an abundant number, since it is smaller than the sum of its proper divisors (13089134941938).

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

11111221211022 is a wasteful number, since it uses less digits than its factorization.

11111221211022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3231885368 (or 3231885365 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 11111221211022 its reverse (22011212211111), we get a palindrome (33122433422133).

The spelling of 11111221211022 in words is "eleven trillion, one hundred eleven billion, two hundred twenty-one million, two hundred eleven thousand, twenty-two".