2100002200121 has 8 divisors (see below), whose sum is σ = 2400152054784. Its totient is φ = 1799889730560.

The previous prime is 2100002200061. The next prime is 2100002200129. The reversal of 2100002200121 is 1210022000012.

It is a happy number.

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 2100002200121 - 2²⁶ = 2099935091257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2100002200129) 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, 9225800 + ... + 9450681.

It is an arithmetic number, because the mean of its divisors is an integer number (300019006848).

Almost surely, 2^{2100002200121} is an apocalyptic number.

It is an amenable number.

2100002200121 is a deficient number, since it is larger than the sum of its proper divisors (300149854663).

2100002200121 is a wasteful number, since it uses less digits than its factorization.

2100002200121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18692551.

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

Adding to 2100002200121 its reverse (1210022000012), we get a palindrome (3310024200133).

The spelling of 2100002200121 in words is "two trillion, one hundred billion, two million, two hundred thousand, one hundred twenty-one".