2121200989 has 8 divisors (see below), whose sum is σ = 2142372672. Its totient is φ = 2100129120.

The previous prime is 2121200987. The next prime is 2121201029. The reversal of 2121200989 is 9890021212.

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 2121200989 - 2¹ = 2121200987 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 (2121200987) 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, 18129 + ... + 67609.

It is an arithmetic number, because the mean of its divisors is an integer number (267796584).

Almost surely, 2^2121200989 is an apocalyptic number.

It is an amenable number.

2121200989 is a deficient number, since it is larger than the sum of its proper divisors (21171683).

2121200989 is a wasteful number, since it uses less digits than its factorization.

2121200989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49907.

The product of its (nonzero) digits is 5184, while the sum is 34.

The square root of 2121200989 is about 46056.4977934710. The cubic root of 2121200989 is about 1284.8741950147.

The spelling of 2121200989 in words is "two billion, one hundred twenty-one million, two hundred thousand, nine hundred eighty-nine".