22111121011221 has 64 divisors (see below), whose sum is σ = 35786620800000. Its totient is φ = 13381390261440.

The previous prime is 22111121011201. The next prime is 22111121011249. The reversal of 22111121011221 is 12211012111122.

It is a happy number.

22111121011221 is a `hidden beast` number, since 2 + 211 + 11 + 210 + 11 + 221 = 666.

It is not a de Polignac number, because 22111121011221 - 2¹⁸ = 22111120749077 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 22111121011194 and 22111121011203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22111121011201) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 601661155 + ... + 601697903.

It is an arithmetic number, because the mean of its divisors is an integer number (559165950000).

Almost surely, 2^{22111121011221} is an apocalyptic number.

It is an amenable number.

22111121011221 is a deficient number, since it is larger than the sum of its proper divisors (13675499788779).

22111121011221 is a wasteful number, since it uses less digits than its factorization.

22111121011221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39631 (or 39625 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 22111121011221 its reverse (12211012111122), we get a palindrome (34322133122343).

The spelling of 22111121011221 in words is "twenty-two trillion, one hundred eleven billion, one hundred twenty-one million, eleven thousand, two hundred twenty-one".