21233320311 has 32 divisors (see below), whose sum is σ = 33577136640. Its totient is φ = 11677873536.

The previous prime is 21233320291. The next prime is 21233320349. The reversal of 21233320311 is 11302333212.

It is not a de Polignac number, because 21233320311 - 2⁶ = 21233320247 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21233300311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 138060 + ... + 248046.

It is an arithmetic number, because the mean of its divisors is an integer number (1049285520).

Almost surely, 2^21233320311 is an apocalyptic number.

21233320311 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

21233320311 is a deficient number, since it is larger than the sum of its proper divisors (12343816329).

21233320311 is a wasteful number, since it uses less digits than its factorization.

21233320311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110343.

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

Adding to 21233320311 its reverse (11302333212), we get a palindrome (32535653523).

The spelling of 21233320311 in words is "twenty-one billion, two hundred thirty-three million, three hundred twenty thousand, three hundred eleven".