21115333615233 has 192 divisors, whose sum is σ = 35292875212800. Its totient is φ = 11108728350720.

The previous prime is 21115333615219. The next prime is 21115333615261. The reversal of 21115333615233 is 33251633351112.

It is not a de Polignac number, because 21115333615233 - 2⁴ = 21115333615217 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 21115333615191 and 21115333615200.

It is not an unprimeable number, because it can be changed into a prime (21115333615273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 2043480135 + ... + 2043490467.

It is an arithmetic number, because the mean of its divisors is an integer number (183817058400).

Almost surely, 2^{21115333615233} is an apocalyptic number.

21115333615233 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

21115333615233 is a deficient number, since it is larger than the sum of its proper divisors (14177541597567).

21115333615233 is a wasteful number, since it uses less digits than its factorization.

21115333615233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10664 (or 10651 counting only the distinct ones).

The product of its digits is 145800, while the sum is 39.

Adding to 21115333615233 its reverse (33251633351112), we get a palindrome (54366966966345).

The spelling of 21115333615233 in words is "twenty-one trillion, one hundred fifteen billion, three hundred thirty-three million, six hundred fifteen thousand, two hundred thirty-three".