21303111323011 has 16 divisors (see below), whose sum is σ = 24995691328000. Its totient is φ = 18147786285384.

The previous prime is 21303111323003. The next prime is 21303111323027. The reversal of 21303111323011 is 11032311130312.

It is not a de Polignac number, because 21303111323011 - 2³ = 21303111323003 is a prime.

It is a super-2 number, since 2×21303111323011² (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 (21303111323311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 190460031 + ... + 190571848.

It is an arithmetic number, because the mean of its divisors is an integer number (1562230708000).

Almost surely, 2^{21303111323011} is an apocalyptic number.

21303111323011 is a deficient number, since it is larger than the sum of its proper divisors (3692580004989).

21303111323011 is an equidigital number, since it uses as much as digits as its factorization.

21303111323011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381032063 (or 381032049 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 22.

Adding to 21303111323011 its reverse (11032311130312), we get a palindrome (32335422453323).

The spelling of 21303111323011 in words is "twenty-one trillion, three hundred three billion, one hundred eleven million, three hundred twenty-three thousand, eleven".