21002100020333 has 4 divisors (see below), whose sum is σ = 21057514532640. Its totient is φ = 20946685508028.

The previous prime is 21002100020309. The next prime is 21002100020441. The reversal of 21002100020333 is 33302000120012.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21002100020333 - 2¹² = 21002100016237 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 (21002100020933) 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, 27707255585 + ... + 27707256342.

It is an arithmetic number, because the mean of its divisors is an integer number (5264378633160).

Almost surely, 2^{21002100020333} is an apocalyptic number.

It is an amenable number.

21002100020333 is a deficient number, since it is larger than the sum of its proper divisors (55414512307).

21002100020333 is an equidigital number, since it uses as much as digits as its factorization.

21002100020333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55414512306.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 21002100020333 its reverse (33302000120012), we get a palindrome (54304100140345).

The spelling of 21002100020333 in words is "twenty-one trillion, two billion, one hundred million, twenty thousand, three hundred thirty-three".