221210112122 has 32 divisors (see below), whose sum is σ = 338700165120. Its totient is φ = 108332638960.

The previous prime is 221210112121. The next prime is 221210112199. The reversal of 221210112122 is 221211012122.

It is a super-2 number, since 2×221210112122² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 221210112122.

It is not an unprimeable number, because it can be changed into a prime (221210112121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15432923 + ... + 15447249.

It is an arithmetic number, because the mean of its divisors is an integer number (10584380160).

Almost surely, 2^221210112122 is an apocalyptic number.

221210112122 is a deficient number, since it is larger than the sum of its proper divisors (117490052998).

221210112122 is a wasteful number, since it uses less digits than its factorization.

221210112122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15106.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 221210112122 its reverse (221211012122), we get a palindrome (442421124244).

The spelling of 221210112122 in words is "two hundred twenty-one billion, two hundred ten million, one hundred twelve thousand, one hundred twenty-two".