12222220121021 has 32 divisors (see below), whose sum is σ = 13116781633536. Its totient is φ = 11360221488000.

The previous prime is 12222220120969. The next prime is 12222220121099. The reversal of 12222220121021 is 12012102222221.

It is a cyclic number.

It is not a de Polignac number, because 12222220121021 - 2²² = 12222215926717 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12222220120984 and 12222220121002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12222220181021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1413459320 + ... + 1413467966.

It is an arithmetic number, because the mean of its divisors is an integer number (409899426048).

Almost surely, 2^{12222220121021} is an apocalyptic number.

It is an amenable number.

12222220121021 is a deficient number, since it is larger than the sum of its proper divisors (894561512515).

12222220121021 is a wasteful number, since it uses less digits than its factorization.

12222220121021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14513.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 12222220121021 its reverse (12012102222221), we get a palindrome (24234322343242).

The spelling of 12222220121021 in words is "twelve trillion, two hundred twenty-two billion, two hundred twenty million, one hundred twenty-one thousand, twenty-one".