22011112012221 has 8 divisors (see below), whose sum is σ = 32609054832960. Its totient is φ = 14674074674796.

The previous prime is 22011112012171. The next prime is 22011112012237. The reversal of 22011112012221 is 12221021111022.

22011112012221 is a `hidden beast` number, since 220 + 11 + 11 + 201 + 2 + 221 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-22011112012221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22011112012194 and 22011112012203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22011112012271) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 407613185385 + ... + 407613185438.

It is an arithmetic number, because the mean of its divisors is an integer number (4076131854120).

Almost surely, 2^{22011112012221} is an apocalyptic number.

It is an amenable number.

22011112012221 is a deficient number, since it is larger than the sum of its proper divisors (10597942820739).

22011112012221 is an equidigital number, since it uses as much as digits as its factorization.

22011112012221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 815226370832 (or 815226370826 counting only the distinct ones).

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

Adding to 22011112012221 its reverse (12221021111022), we get a palindrome (34232133123243).

The spelling of 22011112012221 in words is "twenty-two trillion, eleven billion, one hundred twelve million, twelve thousand, two hundred twenty-one".