21312000032231 has 8 divisors (see below), whose sum is σ = 21315726099024. Its totient is φ = 21308274218880.

The previous prime is 21312000032207. The next prime is 21312000032303. The reversal of 21312000032231 is 13223000021312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21312000032231 - 2³⁴ = 21294820163047 is a prime.

It is a super-3 number, since 3×21312000032231³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21312000032431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 246363896 + ... + 246450386.

It is an arithmetic number, because the mean of its divisors is an integer number (2664465762378).

Almost surely, 2^{21312000032231} is an apocalyptic number.

21312000032231 is a deficient number, since it is larger than the sum of its proper divisors (3726066793).

21312000032231 is an equidigital number, since it uses as much as digits as its factorization.

21312000032231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126721.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21312000032231 its reverse (13223000021312), we get a palindrome (34535000053543).

The spelling of 21312000032231 in words is "twenty-one trillion, three hundred twelve billion, thirty-two thousand, two hundred thirty-one".