211143430311 has 16 divisors (see below), whose sum is σ = 325183465728. Its totient is φ = 120438320000.

The previous prime is 211143430297. The next prime is 211143430321. The reversal of 211143430311 is 113034341112.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 211143430311 - 2²³ = 211135041703 is a prime.

It is a super-2 number, since 2×211143430311² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211143430321) 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, 188184315 + ... + 188185436.

It is an arithmetic number, because the mean of its divisors is an integer number (20323966608).

Almost surely, 2^211143430311 is an apocalyptic number.

211143430311 is a deficient number, since it is larger than the sum of its proper divisors (114040035417).

211143430311 is a wasteful number, since it uses less digits than its factorization.

211143430311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376369782.

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 211143430311 its reverse (113034341112), we get a palindrome (324177771423).

The spelling of 211143430311 in words is "two hundred eleven billion, one hundred forty-three million, four hundred thirty thousand, three hundred eleven".