21113003213344 has 24 divisors (see below), whose sum is σ = 47504257230528. Its totient is φ = 9048429948480.

The previous prime is 21113003213321. The next prime is 21113003213359. The reversal of 21113003213344 is 44331230031112.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47127239092 + ... + 47127239539.

It is an arithmetic number, because the mean of its divisors is an integer number (1979344051272).

Almost surely, 2^{21113003213344} is an apocalyptic number.

It is an amenable number.

21113003213344 is an abundant number, since it is smaller than the sum of its proper divisors (26391254017184).

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

21113003213344 is an equidigital number, since it uses as much as digits as its factorization.

21113003213344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94254478648 (or 94254478640 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 28.

Adding to 21113003213344 its reverse (44331230031112), we get a palindrome (65444233244456).

The spelling of 21113003213344 in words is "twenty-one trillion, one hundred thirteen billion, three million, two hundred thirteen thousand, three hundred forty-four".