231321002111 has 4 divisors (see below), whose sum is σ = 231331992000. Its totient is φ = 231310012224.

The previous prime is 231321002071. The next prime is 231321002117. The reversal of 231321002111 is 111200123132.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 231321002111 - 2²² = 231316807807 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 231321002111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231321002117) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5463311 + ... + 5505488.

It is an arithmetic number, because the mean of its divisors is an integer number (57832998000).

Almost surely, 2^231321002111 is an apocalyptic number.

231321002111 is a deficient number, since it is larger than the sum of its proper divisors (10989889).

231321002111 is a wasteful number, since it uses less digits than its factorization.

231321002111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10989888.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 231321002111 its reverse (111200123132), we get a palindrome (342521125243).

The spelling of 231321002111 in words is "two hundred thirty-one billion, three hundred twenty-one million, two thousand, one hundred eleven".