121312313231 has 8 divisors (see below), whose sum is σ = 121522861824. Its totient is φ = 121101833880.

The previous prime is 121312313207. The next prime is 121312313257. The reversal of 121312313231 is 132313213121.

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

It is a cyclic number.

It is not a de Polignac number, because 121312313231 - 2¹⁰ = 121312312207 is a prime.

It is a super-3 number, since 3×121312313231³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121312313197 and 121312313206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121312313261) 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, 4481720 + ... + 4508706.

It is an arithmetic number, because the mean of its divisors is an integer number (15190357728).

Almost surely, 2^121312313231 is an apocalyptic number.

121312313231 is a deficient number, since it is larger than the sum of its proper divisors (210548593).

121312313231 is an equidigital number, since it uses as much as digits as its factorization.

121312313231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34621.

The product of its digits is 648, while the sum is 23.

Adding to 121312313231 its reverse (132313213121), we get a palindrome (253625526352).

The spelling of 121312313231 in words is "one hundred twenty-one billion, three hundred twelve million, three hundred thirteen thousand, two hundred thirty-one".