121231311203313 has 24 divisors (see below), whose sum is σ = 177017513557248. Its totient is φ = 79945974287712.

The previous prime is 121231311203293. The next prime is 121231311203347. The reversal of 121231311203313 is 313302113132121.

121231311203313 is a `hidden beast` number, since 1 + 2 + 1 + 2 + 31 + 311 + 2 + 0 + 3 + 313 = 666.

It is not a de Polignac number, because 121231311203313 - 2⁹ = 121231311202801 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121231311203393) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 192055095 + ... + 192685292.

It is an arithmetic number, because the mean of its divisors is an integer number (7375729731552).

Almost surely, 2^{121231311203313} is an apocalyptic number.

It is an amenable number.

121231311203313 is a deficient number, since it is larger than the sum of its proper divisors (55786202353935).

121231311203313 is a wasteful number, since it uses less digits than its factorization.

121231311203313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384740773 (or 384740770 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

Adding to 121231311203313 its reverse (313302113132121), we get a palindrome (434533424335434).

The spelling of 121231311203313 in words is "one hundred twenty-one trillion, two hundred thirty-one billion, three hundred eleven million, two hundred three thousand, three hundred thirteen".