21110001013321 has 8 divisors (see below), whose sum is σ = 23032237723488. Its totient is φ = 19188288588000.

The previous prime is 21110001013291. The next prime is 21110001013331. The reversal of 21110001013321 is 12331010001112.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21110001013321 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21110001013295 and 21110001013304.

It is not an unprimeable number, because it can be changed into a prime (21110001013331) 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 7 ways as a sum of consecutive naturals, for example, 130987015 + ... + 131148076.

It is an arithmetic number, because the mean of its divisors is an integer number (2879029715436).

Almost surely, 2^{21110001013321} is an apocalyptic number.

It is an amenable number.

21110001013321 is a deficient number, since it is larger than the sum of its proper divisors (1922236710167).

21110001013321 is a wasteful number, since it uses less digits than its factorization.

21110001013321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262142423.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 21110001013321 its reverse (12331010001112), we get a palindrome (33441011014433).

The spelling of 21110001013321 in words is "twenty-one trillion, one hundred ten billion, one million, thirteen thousand, three hundred twenty-one".