12210022111221 has 24 divisors (see below), whose sum is σ = 19240707092256. Its totient is φ = 7399754843040.

The previous prime is 12210022111213. The next prime is 12210022111229. The reversal of 12210022111221 is 12211122001221.

12210022111221 is a `hidden beast` number, since 1 + 2 + 210 + 0 + 221 + 11 + 221 = 666.

It is an interprime number because it is at equal distance from previous prime (12210022111213) and next prime (12210022111229).

It is not a de Polignac number, because 12210022111221 - 2³ = 12210022111213 is a prime.

It is a super-2 number, since 2×12210022111221² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12210022111194 and 12210022111203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12210022111229) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 712246 + ... + 4992728.

It is an arithmetic number, because the mean of its divisors is an integer number (801696128844).

Almost surely, 2^{12210022111221} is an apocalyptic number.

12210022111221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12210022111221 is a deficient number, since it is larger than the sum of its proper divisors (7030684981035).

12210022111221 is a wasteful number, since it uses less digits than its factorization.

12210022111221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4309313 (or 4309310 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 12210022111221 its reverse (12211122001221), we get a palindrome (24421144112442).

The spelling of 12210022111221 in words is "twelve trillion, two hundred ten billion, twenty-two million, one hundred eleven thousand, two hundred twenty-one".