21113200033231 has 4 divisors (see below), whose sum is σ = 21279445702912. Its totient is φ = 20946954363552.

The previous prime is 21113200033153. The next prime is 21113200033259. The reversal of 21113200033231 is 13233000231112.

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 21113200033231 - 2⁷ = 21113200033103 is a prime.

It is a super-2 number, since 2×21113200033231² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21113200033271) 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, 83122834650 + ... + 83122834903.

It is an arithmetic number, because the mean of its divisors is an integer number (5319861425728).

Almost surely, 2^{21113200033231} is an apocalyptic number.

21113200033231 is a deficient number, since it is larger than the sum of its proper divisors (166245669681).

21113200033231 is a wasteful number, since it uses less digits than its factorization.

21113200033231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166245669680.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 21113200033231 its reverse (13233000231112), we get a palindrome (34346200264343).

The spelling of 21113200033231 in words is "twenty-one trillion, one hundred thirteen billion, two hundred million, thirty-three thousand, two hundred thirty-one".