22111121142 has 96 divisors (see below), whose sum is σ = 56184261120. Its totient is φ = 6212583360.

The previous prime is 22111121099. The next prime is 22111121159. The reversal of 22111121142 is 24112111122.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 114288 + ... + 239340.

It is an arithmetic number, because the mean of its divisors is an integer number (585252720).

Almost surely, 2^22111121142 is an apocalyptic number.

22111121142 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 22111121142, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28092130560).

22111121142 is an abundant number, since it is smaller than the sum of its proper divisors (34073139978).

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

22111121142 is a wasteful number, since it uses less digits than its factorization.

22111121142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125138 (or 125135 counting only the distinct ones).

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

Adding to 22111121142 its reverse (24112111122), we get a palindrome (46223232264).

The spelling of 22111121142 in words is "twenty-two billion, one hundred eleven million, one hundred twenty-one thousand, one hundred forty-two".