12221122121022 has 32 divisors (see below), whose sum is σ = 25728841123200. Its totient is φ = 3859277276448.

The previous prime is 12221122120973. The next prime is 12221122121029. The reversal of 12221122121022 is 22012122112221.

It is a self number, because there is not a number n which added to its sum of digits gives 12221122121022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12221122121029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28246428 + ... + 28675824.

It is an arithmetic number, because the mean of its divisors is an integer number (804026285100).

Almost surely, 2^{12221122121022} is an apocalyptic number.

12221122121022 is an abundant number, since it is smaller than the sum of its proper divisors (13507719002178).

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

12221122121022 is a wasteful number, since it uses less digits than its factorization.

12221122121022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 679080.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 12221122121022 its reverse (22012122112221), we get a palindrome (34233244233243).

The spelling of 12221122121022 in words is "twelve trillion, two hundred twenty-one billion, one hundred twenty-two million, one hundred twenty-one thousand, twenty-two".