121457909369 has 2 divisors, whose sum is σ = 121457909370. Its totient is φ = 121457909368.

The previous prime is 121457909291. The next prime is 121457909381. The reversal of 121457909369 is 963909754121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 113358809344 + 8099100025 = 336688^2 + 89995^2 .

It is an emirp because it is prime and its reverse (963909754121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121457909369 - 2¹² = 121457905273 is a prime.

It is a super-2 number, since 2×121457909369² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (121457905369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60728954684 + 60728954685.

It is an arithmetic number, because the mean of its divisors is an integer number (60728954685).

Almost surely, 2^121457909369 is an apocalyptic number.

It is an amenable number.

121457909369 is a deficient number, since it is larger than the sum of its proper divisors (1).

121457909369 is an equidigital number, since it uses as much as digits as its factorization.

121457909369 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3674160, while the sum is 56.

The spelling of 121457909369 in words is "one hundred twenty-one billion, four hundred fifty-seven million, nine hundred nine thousand, three hundred sixty-nine".