231021331311111 has 8 divisors (see below), whose sum is σ = 336031027361664. Its totient is φ = 140012928067320.

The previous prime is 231021331311107. The next prime is 231021331311131. The reversal of 231021331311111 is 111113133120132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 231021331311111 - 2² = 231021331311107 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231021331311101) 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, 3500323201651 + ... + 3500323201716.

It is an arithmetic number, because the mean of its divisors is an integer number (42003878420208).

Almost surely, 2^{231021331311111} is an apocalyptic number.

231021331311111 is a deficient number, since it is larger than the sum of its proper divisors (105009696050553).

231021331311111 is a wasteful number, since it uses less digits than its factorization.

231021331311111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7000646403381.

The product of its (nonzero) digits is 324, while the sum is 24.

Adding to 231021331311111 its reverse (111113133120132), we get a palindrome (342134464431243).

The spelling of 231021331311111 in words is "two hundred thirty-one trillion, twenty-one billion, three hundred thirty-one million, three hundred eleven thousand, one hundred eleven".