111111202121022 has 112 divisors (see below), whose sum is σ = 252910640097360. Its totient is φ = 36590108714496.

The previous prime is 111111202120993. The next prime is 111111202121207. The reversal of 111111202121022 is 220121202111111.

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 = 111111202120986 and 111111202121004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 78925104 + ... + 80320572.

It is an arithmetic number, because the mean of its divisors is an integer number (2258130715155).

Almost surely, 2^{111111202121022} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 111111202121022, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (126455320048680).

111111202121022 is an abundant number, since it is smaller than the sum of its proper divisors (141799437976338).

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

111111202121022 is an equidigital number, since it uses as much as digits as its factorization.

111111202121022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1396149 (or 1396134 counting only the distinct ones).

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

Adding to 111111202121022 its reverse (220121202111111), we get a palindrome (331232404232133).

The spelling of 111111202121022 in words is "one hundred eleven trillion, one hundred eleven billion, two hundred two million, one hundred twenty-one thousand, twenty-two".