211243441131 has 32 divisors (see below), whose sum is σ = 330095788800. Its totient is φ = 133145026560.

The previous prime is 211243441117. The next prime is 211243441133. The reversal of 211243441131 is 131144342112.

It is a happy number.

211243441131 is a `hidden beast` number, since 2 + 1 + 1 + 243 + 4 + 411 + 3 + 1 = 666.

It is not a de Polignac number, because 211243441131 - 2⁵ = 211243441099 is a prime.

It is a super-2 number, since 2×211243441131² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 211243441095 and 211243441104.

It is not an unprimeable number, because it can be changed into a prime (211243441133) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 167446 + ... + 671211.

It is an arithmetic number, because the mean of its divisors is an integer number (10315493400).

Almost surely, 2^211243441131 is an apocalyptic number.

211243441131 is a deficient number, since it is larger than the sum of its proper divisors (118852347669).

211243441131 is a wasteful number, since it uses less digits than its factorization.

211243441131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 839176 (or 839170 counting only the distinct ones).

The product of its digits is 2304, while the sum is 27.

Adding to 211243441131 its reverse (131144342112), we get a palindrome (342387783243).

The spelling of 211243441131 in words is "two hundred eleven billion, two hundred forty-three million, four hundred forty-one thousand, one hundred thirty-one".