12121122221022 has 64 divisors (see below), whose sum is σ = 25231457180160. Its totient is φ = 3878875929600.

The previous prime is 12121122221017. The next prime is 12121122221051. The reversal of 12121122221022 is 22012222112121.

It is a self number, because there is not a number n which added to its sum of digits gives 12121122221022.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8471254 + ... + 9798182.

It is an arithmetic number, because the mean of its divisors is an integer number (394241518440).

Almost surely, 2^{12121122221022} is an apocalyptic number.

12121122221022 is an abundant number, since it is smaller than the sum of its proper divisors (13110334959138).

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

12121122221022 is a wasteful number, since it uses less digits than its factorization.

12121122221022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1327569.

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

Adding to 12121122221022 its reverse (22012222112121), we get a palindrome (34133344333143).

The spelling of 12121122221022 in words is "twelve trillion, one hundred twenty-one billion, one hundred twenty-two million, two hundred twenty-one thousand, twenty-two".