12222121021340 has 12 divisors (see below), whose sum is σ = 25666454144856. Its totient is φ = 4888848408528.

The previous prime is 12222121021333. The next prime is 12222121021349. The reversal of 12222121021340 is 4312012122221.

It is a super-2 number, since 2×12222121021340² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12222121021349) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 305553025514 + ... + 305553025553.

It is an arithmetic number, because the mean of its divisors is an integer number (2138871178738).

Almost surely, 2^{12222121021340} is an apocalyptic number.

12222121021340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12222121021340 is an abundant number, since it is smaller than the sum of its proper divisors (13444333123516).

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

12222121021340 is a wasteful number, since it uses less digits than its factorization.

12222121021340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 611106051076 (or 611106051074 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 12222121021340 its reverse (4312012122221), we get a palindrome (16534133143561).

The spelling of 12222121021340 in words is "twelve trillion, two hundred twenty-two billion, one hundred twenty-one million, twenty-one thousand, three hundred forty".