121030321 has 4 divisors (see below), whose sum is σ = 121913892. Its totient is φ = 120146752.

The previous prime is 121030309. The next prime is 121030331. The reversal of 121030321 is 123030121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 123030121 = 839 ⋅146639.

It can be written as a sum of positive squares in 2 ways, for example, as 23415921 + 97614400 = 4839^2 + 9880^2 .

It is a cyclic number.

It is not a de Polignac number, because 121030321 - 2⁵ = 121030289 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121030331) 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, 441580 + ... + 441853.

It is an arithmetic number, because the mean of its divisors is an integer number (30478473).

Almost surely, 2^121030321 is an apocalyptic number.

It is an amenable number.

121030321 is a deficient number, since it is larger than the sum of its proper divisors (883571).

121030321 is an equidigital number, since it uses as much as digits as its factorization.

121030321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 883570.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 121030321 is about 11001.3781409422. The cubic root of 121030321 is about 494.6500550114.

Adding to 121030321 its reverse (123030121), we get a palindrome (244060442).

The spelling of 121030321 in words is "one hundred twenty-one million, thirty thousand, three hundred twenty-one".