2121000202001 has 16 divisors (see below), whose sum is σ = 2346463257600. Its totient is φ = 1908177332688.

The previous prime is 2121000201997. The next prime is 2121000202003. The reversal of 2121000202001 is 1002020001212.

It is a happy number.

It is not a de Polignac number, because 2121000202001 - 2² = 2121000201997 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2121000202003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17398061 + ... + 17519546.

It is an arithmetic number, because the mean of its divisors is an integer number (146653953600).

Almost surely, 2^{2121000202001} is an apocalyptic number.

It is an amenable number.

2121000202001 is a deficient number, since it is larger than the sum of its proper divisors (225463055599).

2121000202001 is a wasteful number, since it uses less digits than its factorization.

2121000202001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34917788.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 2121000202001 its reverse (1002020001212), we get a palindrome (3123020203213).

The spelling of 2121000202001 in words is "two trillion, one hundred twenty-one billion, two hundred two thousand, one".