211131335534 has 12 divisors (see below), whose sum is σ = 368402636664. Its totient is φ = 90484858044.

The previous prime is 211131335531. The next prime is 211131335557. The reversal of 211131335534 is 435533131112.

It is a self number, because there is not a number n which added to its sum of digits gives 211131335534.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211131335531) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1077200594 + ... + 1077200789.

It is an arithmetic number, because the mean of its divisors is an integer number (30700219722).

Almost surely, 2^211131335534 is an apocalyptic number.

211131335534 is a deficient number, since it is larger than the sum of its proper divisors (157271301130).

211131335534 is a wasteful number, since it uses less digits than its factorization.

211131335534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2154401399 (or 2154401392 counting only the distinct ones).

The product of its digits is 16200, while the sum is 32.

Adding to 211131335534 its reverse (435533131112), we get a palindrome (646664466646).

The spelling of 211131335534 in words is "two hundred eleven billion, one hundred thirty-one million, three hundred thirty-five thousand, five hundred thirty-four".