21331020343404 has 12 divisors (see below), whose sum is σ = 49772380801304. Its totient is φ = 7110340114464.

The previous prime is 21331020343397. The next prime is 21331020343411. The reversal of 21331020343404 is 40434302013312.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21331020343397) and next prime (21331020343411).

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 888792514297 + ... + 888792514320.

Almost surely, 2^{21331020343404} is an apocalyptic number.

It is an amenable number.

21331020343404 is an abundant number, since it is smaller than the sum of its proper divisors (28441360457900).

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

21331020343404 is a wasteful number, since it uses less digits than its factorization.

21331020343404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1777585028624 (or 1777585028622 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 30.

Adding to 21331020343404 its reverse (40434302013312), we get a palindrome (61765322356716).

The spelling of 21331020343404 in words is "twenty-one trillion, three hundred thirty-one billion, twenty million, three hundred forty-three thousand, four hundred four".