211444012122 has 128 divisors (see below), whose sum is σ = 516216250368. Its totient is φ = 56362521600.

The previous prime is 211444012081. The next prime is 211444012133. The reversal of 211444012122 is 221210444112.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 211444012092 and 211444012101.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 42773983 + ... + 42778925.

It is an arithmetic number, because the mean of its divisors is an integer number (4032939456).

Almost surely, 2^211444012122 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 211444012122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (258108125184).

211444012122 is an abundant number, since it is smaller than the sum of its proper divisors (304772238246).

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

211444012122 is a wasteful number, since it uses less digits than its factorization.

211444012122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5484.

The product of its (nonzero) digits is 1024, while the sum is 24.

Adding to 211444012122 its reverse (221210444112), we get a palindrome (432654456234).

The spelling of 211444012122 in words is "two hundred eleven billion, four hundred forty-four million, twelve thousand, one hundred twenty-two".