121670320331 has 4 divisors (see below), whose sum is σ = 139051794672. Its totient is φ = 104288845992.

The previous prime is 121670320327. The next prime is 121670320393. The reversal of 121670320331 is 133023076121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 133023076121 = 13 ⋅10232544317.

It is a cyclic number.

It is not a de Polignac number, because 121670320331 - 2² = 121670320327 is a prime.

It is a super-2 number, since 2×121670320331² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121670320294 and 121670320303.

It is not an unprimeable number, because it can be changed into a prime (121670320531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8690737160 + ... + 8690737173.

It is an arithmetic number, because the mean of its divisors is an integer number (34762948668).

Almost surely, 2^121670320331 is an apocalyptic number.

121670320331 is a deficient number, since it is larger than the sum of its proper divisors (17381474341).

121670320331 is an equidigital number, since it uses as much as digits as its factorization.

121670320331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17381474340.

The product of its (nonzero) digits is 4536, while the sum is 29.

Adding to 121670320331 its reverse (133023076121), we get a palindrome (254693396452).

The spelling of 121670320331 in words is "one hundred twenty-one billion, six hundred seventy million, three hundred twenty thousand, three hundred thirty-one".