121531201219999 has 8 divisors (see below), whose sum is σ = 121569468840000. Its totient is φ = 121492934664192.

The previous prime is 121531201219949. The next prime is 121531201220059. The reversal of 121531201219999 is 999912102135121.

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 121531201219999 - 2⁹ = 121531201219487 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 (121531201219949) 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, 271585962 + ... + 272033080.

It is an arithmetic number, because the mean of its divisors is an integer number (15196183605000).

Almost surely, 2^{121531201219999} is an apocalyptic number.

121531201219999 is a deficient number, since it is larger than the sum of its proper divisors (38267620001).

121531201219999 is an equidigital number, since it uses as much as digits as its factorization.

121531201219999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 532097.

The product of its (nonzero) digits is 787320, while the sum is 55.

The spelling of 121531201219999 in words is "one hundred twenty-one trillion, five hundred thirty-one billion, two hundred one million, two hundred nineteen thousand, nine hundred ninety-nine".