21331112132340 has 36 divisors (see below), whose sum is σ = 64704373468644. Its totient is φ = 5688296568576.

The previous prime is 21331112132333. The next prime is 21331112132381. The reversal of 21331112132340 is 4323121113312.

21331112132340 is a `hidden beast` number, since 2 + 1 + 3 + 311 + 1 + 2 + 1 + 3 + 2 + 340 = 666.

21331112132340 is digitally balanced in base 5, 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 2262274695396 + 19068837436944 = 1504086^2 + 4366788^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 59253089077 + ... + 59253089436.

Almost surely, 2^{21331112132340} is an apocalyptic number.

21331112132340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21331112132340 is an abundant number, since it is smaller than the sum of its proper divisors (43373261336304).

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

21331112132340 is a wasteful number, since it uses less digits than its factorization.

21331112132340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118506178528 (or 118506178523 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

Adding to 21331112132340 its reverse (4323121113312), we get a palindrome (25654233245652).

The spelling of 21331112132340 in words is "twenty-one trillion, three hundred thirty-one billion, one hundred twelve million, one hundred thirty-two thousand, three hundred forty".