12221001022122 has 64 divisors (see below), whose sum is σ = 28756232236800. Its totient is φ = 3833914775040.

The previous prime is 12221001022117. The next prime is 12221001022141. The reversal of 12221001022122 is 22122010012221.

It is a happy number.

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 = 12221001022095 and 12221001022104.

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, 30359347 + ... + 30759257.

It is an arithmetic number, because the mean of its divisors is an integer number (449316128700).

Almost surely, 2^{12221001022122} is an apocalyptic number.

12221001022122 is an abundant number, since it is smaller than the sum of its proper divisors (16535231214678).

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

12221001022122 is a wasteful number, since it uses less digits than its factorization.

12221001022122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433228 (or 433222 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 12221001022122 its reverse (22122010012221), we get a palindrome (34343011034343).

The spelling of 12221001022122 in words is "twelve trillion, two hundred twenty-one billion, one million, twenty-two thousand, one hundred twenty-two".