211331122134 has 128 divisors (see below), whose sum is σ = 495200563200. Its totient is φ = 59489569920.

The previous prime is 211331122127. The next prime is 211331122159. The reversal of 211331122134 is 431221133112.

It is a congruent number.

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, 7419432 + ... + 7447860.

It is an arithmetic number, because the mean of its divisors is an integer number (3868754400).

Almost surely, 2^211331122134 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 211331122134, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (247600281600).

211331122134 is an abundant number, since it is smaller than the sum of its proper divisors (283869441066).

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

211331122134 is a wasteful number, since it uses less digits than its factorization.

211331122134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28610.

The product of its digits is 864, while the sum is 24.

Adding to 211331122134 its reverse (431221133112), we get a palindrome (642552255246).

The spelling of 211331122134 in words is "two hundred eleven billion, three hundred thirty-one million, one hundred twenty-two thousand, one hundred thirty-four".