121112321 has 4 divisors (see below), whose sum is σ = 132122544. Its totient is φ = 110102100.

The previous prime is 121112317. The next prime is 121112333. The reversal of 121112321 is 123211121.

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 not a de Polignac number, because 121112321 - 2² = 121112317 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 121112296 and 121112305.

It is not an unprimeable number, because it can be changed into a prime (121112311) 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, 5505095 + ... + 5505116.

It is an arithmetic number, because the mean of its divisors is an integer number (33030636).

Almost surely, 2^121112321 is an apocalyptic number.

121112321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121112321 is a deficient number, since it is larger than the sum of its proper divisors (11010223).

121112321 is a wasteful number, since it uses less digits than its factorization.

121112321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11010222.

The product of its digits is 24, while the sum is 14.

The square root of 121112321 is about 11005.1043157255. The cubic root of 121112321 is about 494.7617409298.

Adding to 121112321 its reverse (123211121), we get a palindrome (244323442).

The spelling of 121112321 in words is "one hundred twenty-one million, one hundred twelve thousand, three hundred twenty-one".