121331313123 has 8 divisors (see below), whose sum is σ = 166147383888. Its totient is φ = 78701392224.

The previous prime is 121331313121. The next prime is 121331313143. The reversal of 121331313123 is 321313133121.

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

It is not a de Polignac number, because 121331313123 - 2¹ = 121331313121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121331313093 and 121331313102.

It is not an unprimeable number, because it can be changed into a prime (121331313121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 546537336 + ... + 546537557.

It is an arithmetic number, because the mean of its divisors is an integer number (20768422986).

Almost surely, 2^121331313123 is an apocalyptic number.

121331313123 is a deficient number, since it is larger than the sum of its proper divisors (44816070765).

121331313123 is a wasteful number, since it uses less digits than its factorization.

121331313123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1093074933.

The product of its digits is 972, while the sum is 24.

Adding to 121331313123 its reverse (321313133121), we get a palindrome (442644446244).

The spelling of 121331313123 in words is "one hundred twenty-one billion, three hundred thirty-one million, three hundred thirteen thousand, one hundred twenty-three".