211340442220 has 24 divisors (see below), whose sum is σ = 458131540608. Its totient is φ = 81809203200.

The previous prime is 211340442197. The next prime is 211340442221. The reversal of 211340442220 is 22244043112.

It is not an unprimeable number, because it can be changed into a prime (211340442221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 170435221 + ... + 170436460.

It is an arithmetic number, because the mean of its divisors is an integer number (19088814192).

Almost surely, 2^211340442220 is an apocalyptic number.

211340442220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211340442220 is an abundant number, since it is smaller than the sum of its proper divisors (246791098388).

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

211340442220 is a wasteful number, since it uses less digits than its factorization.

211340442220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340871721 (or 340871719 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 211340442220 its reverse (22244043112), we get a palindrome (233584485332).

The spelling of 211340442220 in words is "two hundred eleven billion, three hundred forty million, four hundred forty-two thousand, two hundred twenty".