1200021121001 has 8 divisors (see below), whose sum is σ = 1210061221824. Its totient is φ = 1190022084720.

The previous prime is 1200021120997. The next prime is 1200021121007. The reversal of 1200021121001 is 1001211200021.

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 1200021121001 - 2² = 1200021120997 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1200021121007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10207445 + ... + 10324338.

It is an arithmetic number, because the mean of its divisors is an integer number (151257652728).

Almost surely, 2^{1200021121001} is an apocalyptic number.

It is an amenable number.

1200021121001 is a deficient number, since it is larger than the sum of its proper divisors (10040100823).

1200021121001 is a wasteful number, since it uses less digits than its factorization.

1200021121001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20532271.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 1200021121001 its reverse (1001211200021), we get a palindrome (2201232321022).

The spelling of 1200021121001 in words is "one trillion, two hundred billion, twenty-one million, one hundred twenty-one thousand, one".