211111230 has 32 divisors (see below), whose sum is σ = 552728448. Its totient is φ = 51178400.

The previous prime is 211111193. The next prime is 211111231. The reversal of 211111230 is 32111112.

It is a super-2 number, since 2×211111230² = 89135902864225800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211111231) 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, 319536 + ... + 320195.

It is an arithmetic number, because the mean of its divisors is an integer number (17272764).

Almost surely, 2^211111230 is an apocalyptic number.

211111230 is an abundant number, since it is smaller than the sum of its proper divisors (341617218).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

211111230 is a wasteful number, since it uses less digits than its factorization.

211111230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 639752.

The product of its (nonzero) digits is 12, while the sum is 12.

The square root of 211111230 is about 14529.6672363823. The cubic root of 211111230 is about 595.4387743447.

Adding to 211111230 its reverse (32111112), we get a palindrome (243222342).

The spelling of 211111230 in words is "two hundred eleven million, one hundred eleven thousand, two hundred thirty".