21002312100231 has 192 divisors, whose sum is σ = 41905621195776. Its totient is φ = 9802462924800.

The previous prime is 21002312100223. The next prime is 21002312100247. The reversal of 21002312100231 is 13200121320012.

21002312100231 is a `hidden beast` number, since 2 + 100 + 231 + 2 + 100 + 231 = 666.

It is not a de Polignac number, because 21002312100231 - 2³ = 21002312100223 is a prime.

It is a super-2 number, since 2×21002312100231² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21002312100131) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 22647996 + ... + 23557086.

It is an arithmetic number, because the mean of its divisors is an integer number (218258443728).

Almost surely, 2^{21002312100231} is an apocalyptic number.

21002312100231 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

21002312100231 is a deficient number, since it is larger than the sum of its proper divisors (20903309095545).

21002312100231 is a wasteful number, since it uses less digits than its factorization.

21002312100231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 909222 (or 909219 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 21002312100231 its reverse (13200121320012), we get a palindrome (34202433420243).

The spelling of 21002312100231 in words is "twenty-one trillion, two billion, three hundred twelve million, one hundred thousand, two hundred thirty-one".