121415443321 has 2 divisors, whose sum is σ = 121415443322. Its totient is φ = 121415443320.

The previous prime is 121415443307. The next prime is 121415443333. The reversal of 121415443321 is 123344514121.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 120478410000 + 937033321 = 347100^2 + 30611^2 .

It is a cyclic number.

It is not a de Polignac number, because 121415443321 - 2⁹ = 121415442809 is a prime.

It is not a weakly prime, because it can be changed into another prime (121415443381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60707721660 + 60707721661.

It is an arithmetic number, because the mean of its divisors is an integer number (60707721661).

Almost surely, 2^121415443321 is an apocalyptic number.

It is an amenable number.

121415443321 is a deficient number, since it is larger than the sum of its proper divisors (1).

121415443321 is an equidigital number, since it uses as much as digits as its factorization.

121415443321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11520, while the sum is 31.

Adding to 121415443321 its reverse (123344514121), we get a palindrome (244759957442).

The spelling of 121415443321 in words is "one hundred twenty-one billion, four hundred fifteen million, four hundred forty-three thousand, three hundred twenty-one".