121331320331 has 8 divisors (see below), whose sum is σ = 136345564320. Its totient is φ = 107128657152.

The previous prime is 121331320321. The next prime is 121331320349. The reversal of 121331320331 is 133023133121.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121331320331 is a prime.

It is a super-2 number, since 2×121331320331² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121331320297 and 121331320306.

It is not an unprimeable number, because it can be changed into a prime (121331320321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 202894886 + ... + 202895483.

It is an arithmetic number, because the mean of its divisors is an integer number (17043195540).

Almost surely, 2^121331320331 is an apocalyptic number.

121331320331 is a deficient number, since it is larger than the sum of its proper divisors (15014243989).

121331320331 is a wasteful number, since it uses less digits than its factorization.

121331320331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 405790405.

The product of its (nonzero) digits is 972, while the sum is 23.

Adding to 121331320331 its reverse (133023133121), we get a palindrome (254354453452).

The spelling of 121331320331 in words is "one hundred twenty-one billion, three hundred thirty-one million, three hundred twenty thousand, three hundred thirty-one".