21000303223311 has 4 divisors (see below), whose sum is σ = 28000404297752. Its totient is φ = 14000202148872.

The previous prime is 21000303223301. The next prime is 21000303223313. The reversal of 21000303223311 is 11332230300012.

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

It is not a de Polignac number, because 21000303223311 - 2²⁵ = 21000269668879 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 (21000303223313) 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, 3500050537216 + ... + 3500050537221.

It is an arithmetic number, because the mean of its divisors is an integer number (7000101074438).

Almost surely, 2^{21000303223311} is an apocalyptic number.

21000303223311 is a deficient number, since it is larger than the sum of its proper divisors (7000101074441).

21000303223311 is an equidigital number, since it uses as much as digits as its factorization.

21000303223311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7000101074440.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 21000303223311 its reverse (11332230300012), we get a palindrome (32332533523323).

The spelling of 21000303223311 in words is "twenty-one trillion, three hundred three million, two hundred twenty-three thousand, three hundred eleven".