12220122212121 has 16 divisors (see below), whose sum is σ = 16536820696064. Its totient is φ = 8025087963024.

The previous prime is 12220122212117. The next prime is 12220122212201. The reversal of 12220122212121 is 12121222102221.

It is not a de Polignac number, because 12220122212121 - 2² = 12220122212117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12220122262121) 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, 38967876 + ... + 39280218.

It is an arithmetic number, because the mean of its divisors is an integer number (1033551293504).

Almost surely, 2^{12220122212121} is an apocalyptic number.

It is an amenable number.

12220122212121 is a deficient number, since it is larger than the sum of its proper divisors (4316698483943).

12220122212121 is a wasteful number, since it uses less digits than its factorization.

12220122212121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 507060.

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

Adding to 12220122212121 its reverse (12121222102221), we get a palindrome (24341344314342).

The spelling of 12220122212121 in words is "twelve trillion, two hundred twenty billion, one hundred twenty-two million, two hundred twelve thousand, one hundred twenty-one".