11111211212022 has 80 divisors (see below), whose sum is σ = 25200201826800. Its totient is φ = 3658760202240.

The previous prime is 11111211211987. The next prime is 11111211212039. The reversal of 11111211212022 is 22021211211111.

It is a happy number.

11111211212022 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 = 11111211211986 and 11111211212004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 15376854 + ... + 16083222.

It is an arithmetic number, because the mean of its divisors is an integer number (315002522835).

Almost surely, 2^{11111211212022} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11111211212022, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12600100913400).

11111211212022 is an abundant number, since it is smaller than the sum of its proper divisors (14088990614778).

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

11111211212022 is a wasteful number, since it uses less digits than its factorization.

11111211212022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 707563 (or 707554 counting only the distinct ones).

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

Adding to 11111211212022 its reverse (22021211211111), we get a palindrome (33132422423133).

The spelling of 11111211212022 in words is "eleven trillion, one hundred eleven billion, two hundred eleven million, two hundred twelve thousand, twenty-two".