211442220423320 has 128 divisors (see below), whose sum is σ = 521208768830400. Its totient is φ = 76840845312000.

The previous prime is 211442220423307. The next prime is 211442220423373. The reversal of 211442220423320 is 23324022244112.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 93559055 + ... + 95792385.

Almost surely, 2^{211442220423320} is an apocalyptic number.

211442220423320 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 211442220423320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (260604384415200).

211442220423320 is an abundant number, since it is smaller than the sum of its proper divisors (309766548407080).

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

211442220423320 is a wasteful number, since it uses less digits than its factorization.

211442220423320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2238189 (or 2238185 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 32.

Adding to 211442220423320 its reverse (23324022244112), we get a palindrome (234766242667432).

The spelling of 211442220423320 in words is "two hundred eleven trillion, four hundred forty-two billion, two hundred twenty million, four hundred twenty-three thousand, three hundred twenty".