121440791209 has 8 divisors (see below), whose sum is σ = 123201483840. Its totient is φ = 119681494800.

The previous prime is 121440791207. The next prime is 121440791237. The reversal of 121440791209 is 902197044121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121440791209 - 2¹ = 121440791207 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121440791207) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 173202 + ... + 522379.

It is an arithmetic number, because the mean of its divisors is an integer number (15400185480).

Almost surely, 2^121440791209 is an apocalyptic number.

It is an amenable number.

121440791209 is a deficient number, since it is larger than the sum of its proper divisors (1760692631).

121440791209 is an equidigital number, since it uses as much as digits as its factorization.

121440791209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 698111.

The product of its (nonzero) digits is 36288, while the sum is 40.

The spelling of 121440791209 in words is "one hundred twenty-one billion, four hundred forty million, seven hundred ninety-one thousand, two hundred nine".