121121213231209 has 8 divisors (see below), whose sum is σ = 121198938765408. Its totient is φ = 121043502597600.

The previous prime is 121121213231159. The next prime is 121121213231267. The reversal of 121121213231209 is 902132312121121.

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 121121213231209 - 2¹⁵ = 121121213198441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121121213231009) 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, 12560134 + ... + 19999984.

It is an arithmetic number, because the mean of its divisors is an integer number (15149867345676).

Almost surely, 2^{121121213231209} is an apocalyptic number.

It is an amenable number.

121121213231209 is a deficient number, since it is larger than the sum of its proper divisors (77725534199).

121121213231209 is an equidigital number, since it uses as much as digits as its factorization.

121121213231209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7450295.

The product of its (nonzero) digits is 2592, while the sum is 31.

The spelling of 121121213231209 in words is "one hundred twenty-one trillion, one hundred twenty-one billion, two hundred thirteen million, two hundred thirty-one thousand, two hundred nine".