22111211101221 has 48 divisors (see below), whose sum is σ = 35860870705920. Its totient is φ = 13010389983360.

The previous prime is 22111211101207. The next prime is 22111211101271. The reversal of 22111211101221 is 12210111211122.

It is a happy number.

22111211101221 is a `hidden beast` number, since 2 + 211 + 121 + 110 + 1 + 221 = 666.

It is not a de Polignac number, because 22111211101221 - 2¹³ = 22111211093029 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22111211101194 and 22111211101203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22111211101271) 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, 4822786 + ... + 8214723.

It is an arithmetic number, because the mean of its divisors is an integer number (747101473040).

Almost surely, 2^{22111211101221} is an apocalyptic number.

It is an amenable number.

22111211101221 is a deficient number, since it is larger than the sum of its proper divisors (13749659604699).

22111211101221 is a wasteful number, since it uses less digits than its factorization.

22111211101221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13038026 (or 13038023 counting only the distinct ones).

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

Adding to 22111211101221 its reverse (12210111211122), we get a palindrome (34321322312343).

The spelling of 22111211101221 in words is "twenty-two trillion, one hundred eleven billion, two hundred eleven million, one hundred one thousand, two hundred twenty-one".