12121210112022 has 96 divisors (see below), whose sum is σ = 29032082726400. Its totient is φ = 3654634777200.

The previous prime is 12121210112021. The next prime is 12121210112083. The reversal of 12121210112022 is 22021101212121.

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 = 12121210111986 and 12121210112004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12121210112021) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3496447 + ... + 6038837.

It is an arithmetic number, because the mean of its divisors is an integer number (302417528400).

Almost surely, 2^{12121210112022} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12121210112022, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14516041363200).

12121210112022 is an abundant number, since it is smaller than the sum of its proper divisors (16910872614378).

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

12121210112022 is a wasteful number, since it uses less digits than its factorization.

12121210112022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2542631 (or 2542606 counting only the distinct ones).

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

Adding to 12121210112022 its reverse (22021101212121), we get a palindrome (34142311324143).

The spelling of 12121210112022 in words is "twelve trillion, one hundred twenty-one billion, two hundred ten million, one hundred twelve thousand, twenty-two".