211011313231 has 4 divisors (see below), whose sum is σ = 211138200832. Its totient is φ = 210884425632.

The previous prime is 211011313193. The next prime is 211011313237. The reversal of 211011313231 is 132313110112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 211011313231 - 2⁷ = 211011313103 is a prime.

It is a super-2 number, since 2×211011313231² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211011313199 and 211011313208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211011313237) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63441306 + ... + 63444631.

It is an arithmetic number, because the mean of its divisors is an integer number (52784550208).

Almost surely, 2^211011313231 is an apocalyptic number.

211011313231 is a deficient number, since it is larger than the sum of its proper divisors (126887601).

211011313231 is a wasteful number, since it uses less digits than its factorization.

211011313231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126887600.

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 211011313231 its reverse (132313110112), we get a palindrome (343324423343).

The spelling of 211011313231 in words is "two hundred eleven billion, eleven million, three hundred thirteen thousand, two hundred thirty-one".