211321012122 has 48 divisors (see below), whose sum is σ = 512985668832. Its totient is φ = 62305947360.

The previous prime is 211321012099. The next prime is 211321012151. The reversal of 211321012122 is 221210123112.

211321012122 is a `hidden beast` number, since 211 + 321 + 0 + 12 + 122 = 666.

It is a super-4 number, since 4×211321012122⁴ (a number of 46 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 211321012095 and 211321012104.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14415348 + ... + 14429999.

It is an arithmetic number, because the mean of its divisors is an integer number (10687201434).

Almost surely, 2^211321012122 is an apocalyptic number.

211321012122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

211321012122 is an abundant number, since it is smaller than the sum of its proper divisors (301664656710).

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

211321012122 is a wasteful number, since it uses less digits than its factorization.

211321012122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28845403 (or 28845400 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 211321012122 its reverse (221210123112), we get a palindrome (432531135234).

The spelling of 211321012122 in words is "two hundred eleven billion, three hundred twenty-one million, twelve thousand, one hundred twenty-two".