211030323231 has 16 divisors (see below), whose sum is σ = 346306171904. Its totient is φ = 111312697824.

The previous prime is 211030323209. The next prime is 211030323247. The reversal of 211030323231 is 132323030112.

It is not a de Polignac number, because 211030323231 - 2¹⁹ = 211029798943 is a prime.

It is a super-2 number, since 2×211030323231² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 211030323198 and 211030323207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211030313231) 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, 386502151 + ... + 386502696.

It is an arithmetic number, because the mean of its divisors is an integer number (21644135744).

Almost surely, 2^211030323231 is an apocalyptic number.

211030323231 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

211030323231 is a deficient number, since it is larger than the sum of its proper divisors (135275848673).

211030323231 is a wasteful number, since it uses less digits than its factorization.

211030323231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 773004870.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 211030323231 its reverse (132323030112), we get a palindrome (343353353343).

The spelling of 211030323231 in words is "two hundred eleven billion, thirty million, three hundred twenty-three thousand, two hundred thirty-one".