211031323131 has 16 divisors (see below), whose sum is σ = 297936011808. Its totient is φ = 132407616000.

The previous prime is 211031323057. The next prime is 211031323177. The reversal of 211031323131 is 131323130112.

It is a happy number.

It is not a de Polignac number, because 211031323131 - 2¹⁰ = 211031322107 is a prime.

It is a super-2 number, since 2×211031323131² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 211031323098 and 211031323107.

It is not an unprimeable number, because it can be changed into a prime (211031323331) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2662981 + ... + 2741081.

It is an arithmetic number, because the mean of its divisors is an integer number (18621000738).

Almost surely, 2^211031323131 is an apocalyptic number.

211031323131 is a deficient number, since it is larger than the sum of its proper divisors (86904688677).

211031323131 is a wasteful number, since it uses less digits than its factorization.

211031323131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131102.

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 211031323131 its reverse (131323130112), we get a palindrome (342354453243).

The spelling of 211031323131 in words is "two hundred eleven billion, thirty-one million, three hundred twenty-three thousand, one hundred thirty-one".