121325509 has 4 divisors (see below), whose sum is σ = 121538560. Its totient is φ = 121112460.

The previous prime is 121325497. The next prime is 121325521. The reversal of 121325509 is 905523121.

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 an interprime number because it is at equal distance from previous prime (121325497) and next prime (121325521).

It is a cyclic number.

It is not a de Polignac number, because 121325509 - 2⁹ = 121324997 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 (121325539) 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, 105669 + ... + 106810.

It is an arithmetic number, because the mean of its divisors is an integer number (30384640).

Almost surely, 2^121325509 is an apocalyptic number.

It is an amenable number.

121325509 is a deficient number, since it is larger than the sum of its proper divisors (213051).

121325509 is an equidigital number, since it uses as much as digits as its factorization.

121325509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213050.

The product of its (nonzero) digits is 2700, while the sum is 28.

The square root of 121325509 is about 11014.7859261994. The cubic root of 121325509 is about 495.0518722635.

The spelling of 121325509 in words is "one hundred twenty-one million, three hundred twenty-five thousand, five hundred nine".