21110321323021 has 16 divisors (see below), whose sum is σ = 24857503287808. Its totient is φ = 17554121712000.

The previous prime is 21110321323001. The next prime is 21110321323027. The reversal of 21110321323021 is 12032312301112.

It is a cyclic number.

It is not a de Polignac number, because 21110321323021 - 2¹¹ = 21110321320973 is a prime.

It is a super-2 number, since 2×21110321323021² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21110321322983 and 21110321323001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21110321323027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 338590005 + ... + 338652346.

It is an arithmetic number, because the mean of its divisors is an integer number (1553593955488).

Almost surely, 2^{21110321323021} is an apocalyptic number.

It is an amenable number.

21110321323021 is a deficient number, since it is larger than the sum of its proper divisors (3747181964787).

21110321323021 is an equidigital number, since it uses as much as digits as its factorization.

21110321323021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 677242492.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 21110321323021 its reverse (12032312301112), we get a palindrome (33142633624133).

The spelling of 21110321323021 in words is "twenty-one trillion, one hundred ten billion, three hundred twenty-one million, three hundred twenty-three thousand, twenty-one".