21002100231331 has 8 divisors (see below), whose sum is σ = 21004880847984. Its totient is φ = 20999319828480.

The previous prime is 21002100231313. The next prime is 21002100231397. The reversal of 21002100231331 is 13313200120012.

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 21002100231331 - 2¹¹ = 21002100229283 is a prime.

It is a super-2 number, since 2×21002100231331² (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 = 21002100231299 and 21002100231308.

It is not an unprimeable number, because it can be changed into a prime (21002100231031) 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, 289340515 + ... + 289413091.

It is an arithmetic number, because the mean of its divisors is an integer number (2625610105998).

Almost surely, 2^{21002100231331} is an apocalyptic number.

21002100231331 is a deficient number, since it is larger than the sum of its proper divisors (2780616653).

21002100231331 is a wasteful number, since it uses less digits than its factorization.

21002100231331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106901.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 21002100231331 its reverse (13313200120012), we get a palindrome (34315300351343).

The spelling of 21002100231331 in words is "twenty-one trillion, two billion, one hundred million, two hundred thirty-one thousand, three hundred thirty-one".