122210212221 has 48 divisors (see below), whose sum is σ = 194200858800. Its totient is φ = 73712830464.

The previous prime is 122210212217. The next prime is 122210212277. The reversal of 122210212221 is 122212012221.

It is a happy number.

122210212221 is a `hidden beast` number, since 1 + 22 + 210 + 212 + 221 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 3778560900 + 118431651321 = 61470^2 + 344139^2 .

It is not a de Polignac number, because 122210212221 - 2² = 122210212217 is a prime.

It is a super-2 number, since 2×122210212221² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 122210212194 and 122210212203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122210212291) 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, 955935 + ... + 1076211.

It is an arithmetic number, because the mean of its divisors is an integer number (4045851225).

Almost surely, 2^122210212221 is an apocalyptic number.

It is an amenable number.

122210212221 is a deficient number, since it is larger than the sum of its proper divisors (71990646579).

122210212221 is a wasteful number, since it uses less digits than its factorization.

122210212221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120558 (or 120555 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 122210212221 its reverse (122212012221), we get a palindrome (244422224442).

The spelling of 122210212221 in words is "one hundred twenty-two billion, two hundred ten million, two hundred twelve thousand, two hundred twenty-one".