21030111210231 has 24 divisors (see below), whose sum is σ = 31357960433280. Its totient is φ = 13567279104000.

The previous prime is 21030111210217. The next prime is 21030111210259. The reversal of 21030111210231 is 13201211103012.

21030111210231 is a `hidden beast` number, since 2 + 10 + 301 + 1 + 121 + 0 + 231 = 666.

It is not a de Polignac number, because 21030111210231 - 2¹⁵ = 21030111177463 is a prime.

It is a super-2 number, since 2×21030111210231² (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 (21030111210211) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5670535 + ... + 8614823.

It is an arithmetic number, because the mean of its divisors is an integer number (1306581684720).

Almost surely, 2^{21030111210231} is an apocalyptic number.

21030111210231 is a deficient number, since it is larger than the sum of its proper divisors (10327849223049).

21030111210231 is a wasteful number, since it uses less digits than its factorization.

21030111210231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2969927 (or 2969924 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 21030111210231 its reverse (13201211103012), we get a palindrome (34231322313243).

The spelling of 21030111210231 in words is "twenty-one trillion, thirty billion, one hundred eleven million, two hundred ten thousand, two hundred thirty-one".