12221121110022 has 32 divisors (see below), whose sum is σ = 29626960268160. Its totient is φ = 3703370033160.

The previous prime is 12221121109993. The next prime is 12221121110039. The reversal of 12221121110022 is 22001112112221.

12221121110022 is a `hidden beast` number, since 122 + 211 + 211 + 100 + 22 = 666.

It is a super-2 number, since 2×12221121110022² (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 = 12221121109977 and 12221121110004.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 10287138388 + ... + 10287139575.

It is an arithmetic number, because the mean of its divisors is an integer number (925842508380).

Almost surely, 2^{12221121110022} is an apocalyptic number.

12221121110022 is an abundant number, since it is smaller than the sum of its proper divisors (17405839158138).

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

12221121110022 is a wasteful number, since it uses less digits than its factorization.

12221121110022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20574277985 (or 20574277979 counting only the distinct ones).

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

Adding to 12221121110022 its reverse (22001112112221), we get a palindrome (34222233222243).

The spelling of 12221121110022 in words is "twelve trillion, two hundred twenty-one billion, one hundred twenty-one million, one hundred ten thousand, twenty-two".