22101211012221 has 144 divisors (see below), whose sum is σ = 39257726796288. Its totient is φ = 12313552608000.

The previous prime is 22101211012219. The next prime is 22101211012253. The reversal of 22101211012221 is 12221011210122.

22101211012221 is a `hidden beast` number, since 221 + 0 + 1 + 211 + 0 + 12 + 221 = 666.

It is not a de Polignac number, because 22101211012221 - 2¹ = 22101211012219 is a prime.

It is a super-2 number, since 2×22101211012221² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 22101211012194 and 22101211012203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22101211012261) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 32884696 + ... + 33550046.

It is an arithmetic number, because the mean of its divisors is an integer number (272623102752).

Almost surely, 2^{22101211012221} is an apocalyptic number.

It is an amenable number.

22101211012221 is a deficient number, since it is larger than the sum of its proper divisors (17156515784067).

22101211012221 is a wasteful number, since it uses less digits than its factorization.

22101211012221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 665454 (or 665425 counting only the distinct ones).

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

Adding to 22101211012221 its reverse (12221011210122), we get a palindrome (34322222222343).

The spelling of 22101211012221 in words is "twenty-two trillion, one hundred one billion, two hundred eleven million, twelve thousand, two hundred twenty-one".