21303023223011 has 4 divisors (see below), whose sum is σ = 21345375158352. Its totient is φ = 21260671287672.

The previous prime is 21303023222879. The next prime is 21303023223019. The reversal of 21303023223011 is 11032232030312.

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 21303023223011 - 2³⁸ = 21028145316067 is a prime.

It is a super-2 number, since 2×21303023223011² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21303023223019) 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, 21175966916 + ... + 21175967921.

It is an arithmetic number, because the mean of its divisors is an integer number (5336343789588).

Almost surely, 2^{21303023223011} is an apocalyptic number.

21303023223011 is a deficient number, since it is larger than the sum of its proper divisors (42351935341).

21303023223011 is an equidigital number, since it uses as much as digits as its factorization.

21303023223011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42351935340.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 21303023223011 its reverse (11032232030312), we get a palindrome (32335255253323).

The spelling of 21303023223011 in words is "twenty-one trillion, three hundred three billion, twenty-three million, two hundred twenty-three thousand, eleven".