21210112103231 has 8 divisors (see below), whose sum is σ = 22142926351584. Its totient is φ = 20278184143360.

The previous prime is 21210112103221. The next prime is 21210112103249. The reversal of 21210112103231 is 13230121101212.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21210112103231 is a prime.

It is a super-2 number, since 2×21210112103231² (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 (21210112103221) 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, 221523206 + ... + 221618931.

It is an arithmetic number, because the mean of its divisors is an integer number (2767865793948).

Almost surely, 2^{21210112103231} is an apocalyptic number.

21210112103231 is a deficient number, since it is larger than the sum of its proper divisors (932814248353).

21210112103231 is a wasteful number, since it uses less digits than its factorization.

21210112103231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443144241.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 21210112103231 its reverse (13230121101212), we get a palindrome (34440233204443).

The spelling of 21210112103231 in words is "twenty-one trillion, two hundred ten billion, one hundred twelve million, one hundred three thousand, two hundred thirty-one".