211022231440 has 20 divisors (see below), whose sum is σ = 490626688284. Its totient is φ = 84408892544.

The previous prime is 211022231419. The next prime is 211022231443. The reversal of 211022231440 is 44132220112.

211022231440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 58944070656 + 152078160784 = 242784^2 + 389972^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (211022231443) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1318888867 + ... + 1318889026.

Almost surely, 2^211022231440 is an apocalyptic number.

211022231440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211022231440 is an abundant number, since it is smaller than the sum of its proper divisors (279604456844).

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

211022231440 is a wasteful number, since it uses less digits than its factorization.

211022231440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2637777906 (or 2637777900 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 211022231440 its reverse (44132220112), we get a palindrome (255154451552).

The spelling of 211022231440 in words is "two hundred eleven billion, twenty-two million, two hundred thirty-one thousand, four hundred forty".