121325457709 has 4 divisors (see below), whose sum is σ = 123136285504. Its totient is φ = 119514629916.

The previous prime is 121325457707. The next prime is 121325457713. The reversal of 121325457709 is 907754523121.

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 121325457709 - 2¹ = 121325457707 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121325457703) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 905413797 + ... + 905413930.

It is an arithmetic number, because the mean of its divisors is an integer number (30784071376).

Almost surely, 2^121325457709 is an apocalyptic number.

It is an amenable number.

121325457709 is a deficient number, since it is larger than the sum of its proper divisors (1810827795).

121325457709 is an equidigital number, since it uses as much as digits as its factorization.

121325457709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1810827794.

The product of its (nonzero) digits is 529200, while the sum is 46.

The spelling of 121325457709 in words is "one hundred twenty-one billion, three hundred twenty-five million, four hundred fifty-seven thousand, seven hundred nine".