211221212122122 has 32 divisors (see below), whose sum is σ = 438155428564224. Its totient is φ = 67825917720000.

The previous prime is 211221212122121. The next prime is 211221212122139. The reversal of 211221212122122 is 221221212122112.

It is a super-2 number, since 2×211221212122122² (a number of 29 digits) contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 211221212122092 and 211221212122101.

It is not an unprimeable number, because it can be changed into a prime (211221212122121) 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, 4710110754 + ... + 4710155597.

It is an arithmetic number, because the mean of its divisors is an integer number (13692357142632).

Almost surely, 2^{211221212122122} is an apocalyptic number.

211221212122122 is an abundant number, since it is smaller than the sum of its proper divisors (226934216442102).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

211221212122122 is a wasteful number, since it uses less digits than its factorization.

211221212122122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9420266494.

The product of its digits is 512, while the sum is 24.

Adding to 211221212122122 its reverse (221221212122112), we get a palindrome (432442424244234).

The spelling of 211221212122122 in words is "two hundred eleven trillion, two hundred twenty-one billion, two hundred twelve million, one hundred twenty-two thousand, one hundred twenty-two".