21303021010111 has 4 divisors (see below), whose sum is σ = 21303049471792. Its totient is φ = 21302992548432.

The previous prime is 21303021010081. The next prime is 21303021010129. The reversal of 21303021010111 is 11101012030312.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 21303021010111 - 2²³ = 21303012621503 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 (21303021010181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (37) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13076931 + ... + 14615476.

It is an arithmetic number, because the mean of its divisors is an integer number (5325762367948).

Almost surely, 2^{21303021010111} is an apocalyptic number.

21303021010111 is a deficient number, since it is larger than the sum of its proper divisors (28461681).

21303021010111 is an equidigital number, since it uses as much as digits as its factorization.

21303021010111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28461680.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 21303021010111 its reverse (11101012030312), we get a palindrome (32404033040423).

It can be divided in two parts, 2130302 and 1010111, that added together give a palindrome (3140413).

The spelling of 21303021010111 in words is "twenty-one trillion, three hundred three billion, twenty-one million, ten thousand, one hundred eleven".