121143309 has 24 divisors (see below), whose sum is σ = 196106688. Its totient is φ = 65149440.

The previous prime is 121143301. The next prime is 121143331. The reversal of 121143309 is 903341121.

It is not a de Polignac number, because 121143309 - 2³ = 121143301 is a prime.

It is a super-3 number, since 3×121143309³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121143301) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3912 + ... + 16049.

It is an arithmetic number, because the mean of its divisors is an integer number (8171112).

Almost surely, 2^121143309 is an apocalyptic number.

It is an amenable number.

121143309 is a deficient number, since it is larger than the sum of its proper divisors (74963379).

121143309 is a wasteful number, since it uses less digits than its factorization.

121143309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20005 (or 19988 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 121143309 is about 11006.5121178328. The cubic root of 121143309 is about 494.8039341856.

The spelling of 121143309 in words is "one hundred twenty-one million, one hundred forty-three thousand, three hundred nine".