21010111223321 has 8 divisors (see below), whose sum is σ = 23122954268064. Its totient is φ = 18931073667520.

The previous prime is 21010111223287. The next prime is 21010111223333. The reversal of 21010111223321 is 12332211101012.

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

It is a cyclic number.

It is not a de Polignac number, because 21010111223321 - 2³⁴ = 20992931354137 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21010111223293 and 21010111223302.

It is not an unprimeable number, because it can be changed into a prime (21010111223821) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 8451370931 + ... + 8451373416.

It is an arithmetic number, because the mean of its divisors is an integer number (2890369283508).

Almost surely, 2^{21010111223321} is an apocalyptic number.

It is an amenable number.

21010111223321 is a deficient number, since it is larger than the sum of its proper divisors (2112843044743).

21010111223321 is a wasteful number, since it uses less digits than its factorization.

21010111223321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16902744471.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 21010111223321 its reverse (12332211101012), we get a palindrome (33342322324333).

The spelling of 21010111223321 in words is "twenty-one trillion, ten billion, one hundred eleven million, two hundred twenty-three thousand, three hundred twenty-one".