2201112211221 has 48 divisors (see below), whose sum is σ = 4023070591488. Its totient is φ = 1126368698400.

The previous prime is 2201112211171. The next prime is 2201112211237. The reversal of 2201112211221 is 1221122111022.

2201112211221 is a `hidden beast` number, since 220 + 1 + 1 + 1 + 221 + 1 + 221 = 666.

It is not a de Polignac number, because 2201112211221 - 2¹⁴ = 2201112194837 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2201112211194 and 2201112211203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2201112211421) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 23656615 + ... + 23749476.

It is an arithmetic number, because the mean of its divisors is an integer number (83813970656).

Almost surely, 2^{2201112211221} is an apocalyptic number.

2201112211221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2201112211221 is a deficient number, since it is larger than the sum of its proper divisors (1821958380267).

2201112211221 is a wasteful number, since it uses less digits than its factorization.

2201112211221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47406182 (or 47406179 counting only the distinct ones).

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

Adding to 2201112211221 its reverse (1221122111022), we get a palindrome (3422234322243).

The spelling of 2201112211221 in words is "two trillion, two hundred one billion, one hundred twelve million, two hundred eleven thousand, two hundred twenty-one".