211311123434 has 8 divisors (see below), whose sum is σ = 316968838500. Its totient is φ = 105654843936.

The previous prime is 211311123431. The next prime is 211311123451. The reversal of 211311123434 is 434321113112.

It can be written as a sum of positive squares in 2 ways, for example, as 144625808209 + 66685315225 = 380297^2 + 258235^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×211311123434³ (a number of 35 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (211311123431) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 157982 + ... + 669014.

Almost surely, 2^211311123434 is an apocalyptic number.

211311123434 is a deficient number, since it is larger than the sum of its proper divisors (105657715066).

211311123434 is a wasteful number, since it uses less digits than its factorization.

211311123434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 717784.

The product of its digits is 1728, while the sum is 26.

Adding to 211311123434 its reverse (434321113112), we get a palindrome (645632236546).

The spelling of 211311123434 in words is "two hundred eleven billion, three hundred eleven million, one hundred twenty-three thousand, four hundred thirty-four".