121919219999 has 8 divisors (see below), whose sum is σ = 122160874080. Its totient is φ = 121677696000.

The previous prime is 121919219987. The next prime is 121919220011. The reversal of 121919219999 is 999912919121.

It is an interprime number because it is at equal distance from previous prime (121919219987) and next prime (121919220011).

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 121919219999 - 2¹⁶ = 121919154463 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 (121919210999) 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, 1964159 + ... + 2025279.

It is an arithmetic number, because the mean of its divisors is an integer number (15270109260).

Almost surely, 2^121919219999 is an apocalyptic number.

121919219999 is a deficient number, since it is larger than the sum of its proper divisors (241654081).

121919219999 is an equidigital number, since it uses as much as digits as its factorization.

121919219999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65041.

The product of its digits is 2125764, while the sum is 62.

The spelling of 121919219999 in words is "one hundred twenty-one billion, nine hundred nineteen million, two hundred nineteen thousand, nine hundred ninety-nine".