12121111112022 has 40 divisors (see below), whose sum is σ = 29629382722632. Its totient is φ = 3673063972800.

The previous prime is 12121111111969. The next prime is 12121111112023. The reversal of 12121111112022 is 22021111112121.

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 = 12121111111986 and 12121111112004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12121111112023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3400983379 + ... + 3400986942.

Almost surely, 2^{12121111112022} is an apocalyptic number.

12121111112022 is an abundant number, since it is smaller than the sum of its proper divisors (17508271610610).

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

12121111112022 is a wasteful number, since it uses less digits than its factorization.

12121111112022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6801970346 (or 6801970337 counting only the distinct ones).

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

Adding to 12121111112022 its reverse (22021111112121), we get a palindrome (34142222224143).

Subtracting 12121111112022 from its reverse (22021111112121), we obtain a palindrome (9900000000099).

The spelling of 12121111112022 in words is "twelve trillion, one hundred twenty-one billion, one hundred eleven million, one hundred twelve thousand, twenty-two".