121221201200999 has 8 divisors (see below), whose sum is σ = 124404832004208. Its totient is φ = 118048380690240.

The previous prime is 121221201200963. The next prime is 121221201201011. The reversal of 121221201200999 is 999002102122121.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121221201200999 is a prime.

It is a super-2 number, since 2×121221201200999² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121221201200699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2702550392 + ... + 2702595245.

It is an arithmetic number, because the mean of its divisors is an integer number (15550604000526).

Almost surely, 2^{121221201200999} is an apocalyptic number.

121221201200999 is a deficient number, since it is larger than the sum of its proper divisors (3183630803209).

121221201200999 is an equidigital number, since it uses as much as digits as its factorization.

121221201200999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5405146225.

The product of its (nonzero) digits is 23328, while the sum is 41.

The spelling of 121221201200999 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, two hundred one million, two hundred thousand, nine hundred ninety-nine".