531135221234211 has 48 divisors (see below), whose sum is σ = 859576613575680. Its totient is φ = 313194207389760.

The previous prime is 531135221234207. The next prime is 531135221234347. The reversal of 531135221234211 is 112432122531135.

531135221234211 is a `hidden beast` number, since 5 + 3 + 1 + 1 + 3 + 5 + 221 + 2 + 3 + 421 + 1 = 666.

It is not a de Polignac number, because 531135221234211 - 2² = 531135221234207 is a prime.

It is a super-2 number, since 2×531135221234211² (a number of 30 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (531135221234201) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 196234446 + ... + 198922668.

It is an arithmetic number, because the mean of its divisors is an integer number (17907846116160).

Almost surely, 2^{531135221234211} is an apocalyptic number.

531135221234211 is a deficient number, since it is larger than the sum of its proper divisors (328441392341469).

531135221234211 is a wasteful number, since it uses less digits than its factorization.

531135221234211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2742216 (or 2742213 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

Adding to 531135221234211 its reverse (112432122531135), we get a palindrome (643567343765346).

The spelling of 531135221234211 in words is "five hundred thirty-one trillion, one hundred thirty-five billion, two hundred twenty-one million, two hundred thirty-four thousand, two hundred eleven".