121021030321 has 4 divisors (see below), whose sum is σ = 126282814272. Its totient is φ = 115759246372.

The previous prime is 121021030313. The next prime is 121021030387. The reversal of 121021030321 is 123030120121.

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 121021030321 - 2³ = 121021030313 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121021030295 and 121021030304.

It is not an unprimeable number, because it can be changed into a prime (121021030301) 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, 2630891941 + ... + 2630891986.

It is an arithmetic number, because the mean of its divisors is an integer number (31570703568).

Almost surely, 2^121021030321 is an apocalyptic number.

It is an amenable number.

121021030321 is a deficient number, since it is larger than the sum of its proper divisors (5261783951).

121021030321 is an equidigital number, since it uses as much as digits as its factorization.

121021030321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5261783950.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 121021030321 its reverse (123030120121), we get a palindrome (244051150442).

The spelling of 121021030321 in words is "one hundred twenty-one billion, twenty-one million, thirty thousand, three hundred twenty-one".