21031323020333 has 4 divisors (see below), whose sum is σ = 21039433830108. Its totient is φ = 21023212210560.

The previous prime is 21031323020327. The next prime is 21031323020341. The reversal of 21031323020333 is 33302032313012.

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 13468922020009 + 7562401000324 = 3670003^2 + 2749982^2 .

It is a cyclic number.

It is not a de Polignac number, because 21031323020333 - 2⁶ = 21031323020269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21031323020033) 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, 4055400998 + ... + 4055406183.

It is an arithmetic number, because the mean of its divisors is an integer number (5259858457527).

Almost surely, 2^{21031323020333} is an apocalyptic number.

It is an amenable number.

21031323020333 is a deficient number, since it is larger than the sum of its proper divisors (8110809775).

21031323020333 is an equidigital number, since it uses as much as digits as its factorization.

21031323020333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8110809774.

The product of its (nonzero) digits is 5832, while the sum is 26.

Adding to 21031323020333 its reverse (33302032313012), we get a palindrome (54333355333345).

The spelling of 21031323020333 in words is "twenty-one trillion, thirty-one billion, three hundred twenty-three million, twenty thousand, three hundred thirty-three".