211423434220 has 12 divisors (see below), whose sum is σ = 443989211904. Its totient is φ = 84569373680.

The previous prime is 211423434199. The next prime is 211423434247. The reversal of 211423434220 is 22434324112.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5285585836 + ... + 5285585875.

It is an arithmetic number, because the mean of its divisors is an integer number (36999100992).

Almost surely, 2^211423434220 is an apocalyptic number.

211423434220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211423434220 is an abundant number, since it is smaller than the sum of its proper divisors (232565777684).

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

211423434220 is a wasteful number, since it uses less digits than its factorization.

211423434220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10571171720 (or 10571171718 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 211423434220 its reverse (22434324112), we get a palindrome (233857758332).

The spelling of 211423434220 in words is "two hundred eleven billion, four hundred twenty-three million, four hundred thirty-four thousand, two hundred twenty".