21000132112231 has 4 divisors (see below), whose sum is σ = 21000145449712. Its totient is φ = 21000118774752.

The previous prime is 21000132112217. The next prime is 21000132112247. The reversal of 21000132112231 is 13221123100012.

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 21000132112231 - 2¹⁹ = 21000131587943 is a prime.

It is a super-2 number, since 2×21000132112231² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21000132112199 and 21000132112208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21000132116231) 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, 3932811 + ... + 7580716.

It is an arithmetic number, because the mean of its divisors is an integer number (5250036362428).

Almost surely, 2^{21000132112231} is an apocalyptic number.

21000132112231 is a deficient number, since it is larger than the sum of its proper divisors (13337481).

21000132112231 is a wasteful number, since it uses less digits than its factorization.

21000132112231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13337480.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 21000132112231 its reverse (13221123100012), we get a palindrome (34221255212243).

The spelling of 21000132112231 in words is "twenty-one trillion, one hundred thirty-two million, one hundred twelve thousand, two hundred thirty-one".