121246744321 has 2 divisors, whose sum is σ = 121246744322. Its totient is φ = 121246744320.

The previous prime is 121246744319. The next prime is 121246744337. The reversal of 121246744321 is 123447642121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 72341633296 + 48905111025 = 268964^2 + 221145^2 .

It is an emirp because it is prime and its reverse (123447642121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121246744321 - 2¹ = 121246744319 is a prime.

Together with 121246744319, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (121246744391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60623372160 + 60623372161.

It is an arithmetic number, because the mean of its divisors is an integer number (60623372161).

Almost surely, 2^121246744321 is an apocalyptic number.

It is an amenable number.

121246744321 is a deficient number, since it is larger than the sum of its proper divisors (1).

121246744321 is an equidigital number, since it uses as much as digits as its factorization.

121246744321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64512, while the sum is 37.

The spelling of 121246744321 in words is "one hundred twenty-one billion, two hundred forty-six million, seven hundred forty-four thousand, three hundred twenty-one".