12210022122221 has 16 divisors (see below), whose sum is σ = 15357600528768. Its totient is φ = 9430105574400.

The previous prime is 12210022122119. The next prime is 12210022122229. The reversal of 12210022122221 is 12222122001221.

It is not a de Polignac number, because 12210022122221 - 2¹⁰ = 12210022121197 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12210022122193 and 12210022122202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12210022122229) 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, 701636060 + ... + 701653461.

It is an arithmetic number, because the mean of its divisors is an integer number (959850033048).

Almost surely, 2^{12210022122221} is an apocalyptic number.

12210022122221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12210022122221 is a deficient number, since it is larger than the sum of its proper divisors (3147578406547).

12210022122221 is a wasteful number, since it uses less digits than its factorization.

12210022122221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1403289652.

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

Adding to 12210022122221 its reverse (12222122001221), we get a palindrome (24432144123442).

The spelling of 12210022122221 in words is "twelve trillion, two hundred ten billion, twenty-two million, one hundred twenty-two thousand, two hundred twenty-one".