121331330321 has 4 divisors (see below), whose sum is σ = 121338313200. Its totient is φ = 121324347444.

The previous prime is 121331330287. The next prime is 121331330327. The reversal of 121331330321 is 123033133121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121331330321 is a prime.

It is a super-2 number, since 2×121331330321² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121331330327) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3465311 + ... + 3500148.

It is an arithmetic number, because the mean of its divisors is an integer number (30334578300).

Almost surely, 2^121331330321 is an apocalyptic number.

It is an amenable number.

121331330321 is a deficient number, since it is larger than the sum of its proper divisors (6982879).

121331330321 is an equidigital number, since it uses as much as digits as its factorization.

121331330321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6982878.

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

Adding to 121331330321 its reverse (123033133121), we get a palindrome (244364463442).

The spelling of 121331330321 in words is "one hundred twenty-one billion, three hundred thirty-one million, three hundred thirty thousand, three hundred twenty-one".