201000121989 has 16 divisors (see below), whose sum is σ = 268531009152. Its totient is φ = 133734924288.

The previous prime is 201000121961. The next prime is 201000122003. The reversal of 201000121989 is 989121000102.

201000121989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 201000121989 - 2⁹ = 201000121477 is a prime.

It is a super-2 number, since 2×201000121989² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201000121909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3083397 + ... + 3147909.

It is an arithmetic number, because the mean of its divisors is an integer number (16783188072).

Almost surely, 2^201000121989 is an apocalyptic number.

It is an amenable number.

201000121989 is a deficient number, since it is larger than the sum of its proper divisors (67530887163).

201000121989 is a wasteful number, since it uses less digits than its factorization.

201000121989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66556.

The product of its (nonzero) digits is 2592, while the sum is 33.

The spelling of 201000121989 in words is "two hundred one billion, one hundred twenty-one thousand, nine hundred eighty-nine".