21111121112022 has 24 divisors (see below), whose sum is σ = 47318030079840. Its totient is φ = 6794383806000.

The previous prime is 21111121112021. The next prime is 21111121112047. The reversal of 21111121112022 is 22021112111112.

It is a happy number.

It is a super-2 number, since 2×21111121112022² (a number of 27 digits) contains 22 as substring.

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 = 21111121111986 and 21111121112004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21111121112021) 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, 20221379854 + ... + 20221380897.

It is an arithmetic number, because the mean of its divisors is an integer number (1971584586660).

Almost surely, 2^{21111121112022} is an apocalyptic number.

21111121112022 is an abundant number, since it is smaller than the sum of its proper divisors (26206908967818).

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

21111121112022 is a wasteful number, since it uses less digits than its factorization.

21111121112022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40442760788 (or 40442760785 counting only the distinct ones).

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

Adding to 21111121112022 its reverse (22021112111112), we get a palindrome (43132233223134).

The spelling of 21111121112022 in words is "twenty-one trillion, one hundred eleven billion, one hundred twenty-one million, one hundred twelve thousand, twenty-two".