121310403321421 has 4 divisors (see below), whose sum is σ = 121988115072000. Its totient is φ = 120632691570844.

The previous prime is 121310403321397. The next prime is 121310403321439. The reversal of 121310403321421 is 124123304013121.

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 121310403321421 - 2¹¹ = 121310403319373 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121310403321421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121310403321491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 338855875021 + ... + 338855875378.

It is an arithmetic number, because the mean of its divisors is an integer number (30497028768000).

Almost surely, 2^{121310403321421} is an apocalyptic number.

It is an amenable number.

121310403321421 is a deficient number, since it is larger than the sum of its proper divisors (677711750579).

121310403321421 is an equidigital number, since it uses as much as digits as its factorization.

121310403321421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 677711750578.

The product of its (nonzero) digits is 3456, while the sum is 28.

Adding to 121310403321421 its reverse (124123304013121), we get a palindrome (245433707334542).

The spelling of 121310403321421 in words is "one hundred twenty-one trillion, three hundred ten billion, four hundred three million, three hundred twenty-one thousand, four hundred twenty-one".