22122012211221 has 8 divisors (see below), whose sum is σ = 31764940611040. Its totient is φ = 13613545976112.

The previous prime is 22122012211199. The next prime is 22122012211237. The reversal of 22122012211221 is 12211221022122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 22122012211221 - 2²¹ = 22122010114069 is a prime.

It is a super-2 number, since 2×22122012211221² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22122012218221) 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, 283615541131 + ... + 283615541208.

It is an arithmetic number, because the mean of its divisors is an integer number (3970617576380).

Almost surely, 2^{22122012211221} is an apocalyptic number.

It is an amenable number.

22122012211221 is a deficient number, since it is larger than the sum of its proper divisors (9642928399819).

22122012211221 is a wasteful number, since it uses less digits than its factorization.

22122012211221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 567231082355.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 22122012211221 its reverse (12211221022122), we get a palindrome (34333233233343).

The spelling of 22122012211221 in words is "twenty-two trillion, one hundred twenty-two billion, twelve million, two hundred eleven thousand, two hundred twenty-one".