121343430321 has 20 divisors (see below), whose sum is σ = 181698778800. Its totient is φ = 80702529336.

The previous prime is 121343430319. The next prime is 121343430323. The reversal of 121343430321 is 123034343121.

It is a happy number.

121343430321 is a `hidden beast` number, since 12 + 1 + 343 + 4 + 303 + 2 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (121343430319) and next prime (121343430323).

It is not a de Polignac number, because 121343430321 - 2¹ = 121343430319 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (121343430323) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1753731 + ... + 1821608.

It is an arithmetic number, because the mean of its divisors is an integer number (9084938940).

Almost surely, 2^121343430321 is an apocalyptic number.

It is an amenable number.

121343430321 is a deficient number, since it is larger than the sum of its proper divisors (60355348479).

121343430321 is an equidigital number, since it uses as much as digits as its factorization.

121343430321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3575770 (or 3575761 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

Adding to 121343430321 its reverse (123034343121), we get a palindrome (244377773442).

The spelling of 121343430321 in words is "one hundred twenty-one billion, three hundred forty-three million, four hundred thirty thousand, three hundred twenty-one".