21330203311011 has 32 divisors (see below), whose sum is σ = 33926992662528. Its totient is φ = 11655085606560.

The previous prime is 21330203310989. The next prime is 21330203311033. The reversal of 21330203311011 is 11011330203312.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21330203310989) and next prime (21330203311033).

It is not a de Polignac number, because 21330203311011 - 2⁵ = 21330203310979 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (21330203111011) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5389125 + ... + 8467766.

It is an arithmetic number, because the mean of its divisors is an integer number (1060218520704).

Almost surely, 2^{21330203311011} is an apocalyptic number.

21330203311011 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

21330203311011 is a deficient number, since it is larger than the sum of its proper divisors (12596789351517).

21330203311011 is a wasteful number, since it uses less digits than its factorization.

21330203311011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13860111.

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 21330203311011 its reverse (11011330203312), we get a palindrome (32341533514323).

The spelling of 21330203311011 in words is "twenty-one trillion, three hundred thirty billion, two hundred three million, three hundred eleven thousand, eleven".