231333012121111 has 4 divisors (see below), whose sum is σ = 231339610547800. Its totient is φ = 231326413694424.

The previous prime is 231333012121097. The next prime is 231333012121121. The reversal of 231333012121111 is 111121210333132.

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 231333012121111 - 2¹⁹ = 231333011596823 is a prime.

It is a super-4 number, since 4×231333012121111⁴ (a number of 59 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231333012121121) 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, 3299160756 + ... + 3299230873.

It is an arithmetic number, because the mean of its divisors is an integer number (57834902636950).

Almost surely, 2^{231333012121111} is an apocalyptic number.

231333012121111 is a deficient number, since it is larger than the sum of its proper divisors (6598426689).

231333012121111 is an equidigital number, since it uses as much as digits as its factorization.

231333012121111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6598426688.

The product of its (nonzero) digits is 648, while the sum is 25.

Adding to 231333012121111 its reverse (111121210333132), we get a palindrome (342454222454243).

The spelling of 231333012121111 in words is "two hundred thirty-one trillion, three hundred thirty-three billion, twelve million, one hundred twenty-one thousand, one hundred eleven".