21021112112333 has 4 divisors (see below), whose sum is σ = 21041461689468. Its totient is φ = 21000762535200.

The previous prime is 21021112112323. The next prime is 21021112112339. The reversal of 21021112112333 is 33321121112012.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 19288987637929 + 1732124474404 = 4391923^2 + 1316102^2 .

It is a cyclic number.

It is not a de Polignac number, because 21021112112333 - 2²⁴ = 21021095335117 is a prime.

It is a super-3 number, since 3×21021112112333³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21021112112299 and 21021112112308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21021112112339) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10174787018 + ... + 10174789083.

It is an arithmetic number, because the mean of its divisors is an integer number (5260365422367).

Almost surely, 2^{21021112112333} is an apocalyptic number.

It is an amenable number.

21021112112333 is a deficient number, since it is larger than the sum of its proper divisors (20349577135).

21021112112333 is a wasteful number, since it uses less digits than its factorization.

21021112112333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20349577134.

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 21021112112333 its reverse (33321121112012), we get a palindrome (54342233224345).

The spelling of 21021112112333 in words is "twenty-one trillion, twenty-one billion, one hundred twelve million, one hundred twelve thousand, three hundred thirty-three".