211230230420 has 96 divisors (see below), whose sum is σ = 500067824256. Its totient is φ = 74281536000.

The previous prime is 211230230401. The next prime is 211230230483. The reversal of 211230230420 is 24032032112.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 211230230392 and 211230230401.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 844922 + ... + 1065998.

It is an arithmetic number, because the mean of its divisors is an integer number (5209039836).

Almost surely, 2^211230230420 is an apocalyptic number.

211230230420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 211230230420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (250033912128).

211230230420 is an abundant number, since it is smaller than the sum of its proper divisors (288837593836).

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

211230230420 is a wasteful number, since it uses less digits than its factorization.

211230230420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221241 (or 221239 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 211230230420 its reverse (24032032112), we get a palindrome (235262262532).

The spelling of 211230230420 in words is "two hundred eleven billion, two hundred thirty million, two hundred thirty thousand, four hundred twenty".