211201222122 has 32 divisors (see below), whose sum is σ = 512002964160. Its totient is φ = 64000370160.

The previous prime is 211201222121. The next prime is 211201222153. The reversal of 211201222122 is 221222102112.

It is a happy number.

211201222122 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 = 211201222095 and 211201222104.

It is not an unprimeable number, because it can be changed into a prime (211201222121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 177778213 + ... + 177779400.

It is an arithmetic number, because the mean of its divisors is an integer number (16000092630).

Almost surely, 2^211201222122 is an apocalyptic number.

211201222122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

211201222122 is an abundant number, since it is smaller than the sum of its proper divisors (300801742038).

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

211201222122 is a wasteful number, since it uses less digits than its factorization.

211201222122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355557635 (or 355557629 counting only the distinct ones).

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

Adding to 211201222122 its reverse (221222102112), we get a palindrome (432423324234).

The spelling of 211201222122 in words is "two hundred eleven billion, two hundred one million, two hundred twenty-two thousand, one hundred twenty-two".