211231230210 has 384 divisors, whose sum is σ = 741706108416. Its totient is φ = 40278712320.

The previous prime is 211231230193. The next prime is 211231230227. The reversal of 211231230210 is 12032132112.

211231230210 is a `hidden beast` number, since 2 + 112 + 312 + 30 + 210 = 666.

It is an interprime number because it is at equal distance from previous prime (211231230193) and next prime (211231230227).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 15578794 + ... + 15592346.

It is an arithmetic number, because the mean of its divisors is an integer number (1931526324).

Almost surely, 2^211231230210 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 211231230210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (370853054208).

211231230210 is an abundant number, since it is smaller than the sum of its proper divisors (530474878206).

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

211231230210 is a wasteful number, since it uses less digits than its factorization.

211231230210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13770 (or 13767 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 211231230210 its reverse (12032132112), we get a palindrome (223263362322).

The spelling of 211231230210 in words is "two hundred eleven billion, two hundred thirty-one million, two hundred thirty thousand, two hundred ten".