121001200121999 has 8 divisors (see below), whose sum is σ = 123576185349120. Its totient is φ = 118426235378616.

The previous prime is 121001200121911. The next prime is 121001200122059. The reversal of 121001200121999 is 999121002100121.

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 121001200121999 - 2⁴⁰ = 119901688494223 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 (121001200121099) 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, 7127582 + ... + 17111540.

It is an arithmetic number, because the mean of its divisors is an integer number (15447023168640).

Almost surely, 2^{121001200121999} is an apocalyptic number.

121001200121999 is a deficient number, since it is larger than the sum of its proper divisors (2574985227121).

121001200121999 is an equidigital number, since it uses as much as digits as its factorization.

121001200121999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10241869.

The product of its (nonzero) digits is 5832, while the sum is 38.

The spelling of 121001200121999 in words is "one hundred twenty-one trillion, one billion, two hundred million, one hundred twenty-one thousand, nine hundred ninety-nine".