2121200222201 has 16 divisors (see below), whose sum is σ = 2168573904000. Its totient is φ = 2074212885888.

The previous prime is 2121200222161. The next prime is 2121200222227. The reversal of 2121200222201 is 1022220021212.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2121200222201 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2121200222201.

It is not an unprimeable number, because it can be changed into a prime (2121200224201) 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, 47798915 + ... + 47843271.

It is an arithmetic number, because the mean of its divisors is an integer number (135535869000).

Almost surely, 2^{2121200222201} is an apocalyptic number.

It is an amenable number.

2121200222201 is a deficient number, since it is larger than the sum of its proper divisors (47373681799).

2121200222201 is a wasteful number, since it uses less digits than its factorization.

2121200222201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48688.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 2121200222201 its reverse (1022220021212), we get a palindrome (3143420243413).

The spelling of 2121200222201 in words is "two trillion, one hundred twenty-one billion, two hundred million, two hundred twenty-two thousand, two hundred one".