231221011001103 has 16 divisors (see below), whose sum is σ = 342703878184800. Its totient is φ = 154077936151680.

The previous prime is 231221011001083. The next prime is 231221011001111. The reversal of 231221011001103 is 301100110122132.

231221011001103 is a `hidden beast` number, since 231 + 2 + 210 + 110 + 0 + 110 + 3 = 666.

It is not a de Polignac number, because 231221011001103 - 2¹² = 231221010997007 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231221011001503) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1927842138 + ... + 1927962071.

It is an arithmetic number, because the mean of its divisors is an integer number (21418992386550).

Almost surely, 2^{231221011001103} is an apocalyptic number.

231221011001103 is a deficient number, since it is larger than the sum of its proper divisors (111482867183697).

231221011001103 is a wasteful number, since it uses less digits than its factorization.

231221011001103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3855806439 (or 3855806433 counting only the distinct ones).

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

Adding to 231221011001103 its reverse (301100110122132), we get a palindrome (532321121123235).

The spelling of 231221011001103 in words is "two hundred thirty-one trillion, two hundred twenty-one billion, eleven million, one thousand, one hundred three".