12111212210022 has 64 divisors (see below), whose sum is σ = 28111806720000. Its totient is φ = 3857718420864.

The previous prime is 12111212210017. The next prime is 12111212210023. The reversal of 12111212210022 is 22001221211121.

It is a super-2 number, since 2×12111212210022² (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 = 12111212209977 and 12111212210004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12111212210023) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3579022 + ... + 6085377.

It is an arithmetic number, because the mean of its divisors is an integer number (439246980000).

Almost surely, 2^{12111212210022} is an apocalyptic number.

12111212210022 is an abundant number, since it is smaller than the sum of its proper divisors (16000594509978).

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

12111212210022 is a wasteful number, since it uses less digits than its factorization.

12111212210022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9665442 (or 9665436 counting only the distinct ones).

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

Adding to 12111212210022 its reverse (22001221211121), we get a palindrome (34112433421143).

The spelling of 12111212210022 in words is "twelve trillion, one hundred eleven billion, two hundred twelve million, two hundred ten thousand, twenty-two".