2000121998 has 16 divisors (see below), whose sum is σ = 3577858560. Its totient is φ = 819925656.

The previous prime is 2000121979. The next prime is 2000122037. The reversal of 2000121998 is 8991210002.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3105458 + ... + 3106101.

It is an arithmetic number, because the mean of its divisors is an integer number (223616160).

Almost surely, 2^2000121998 is an apocalyptic number.

2000121998 is a deficient number, since it is larger than the sum of its proper divisors (1577736562).

2000121998 is a wasteful number, since it uses less digits than its factorization.

2000121998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6211591.

The product of its (nonzero) digits is 2592, while the sum is 32.

The square root of 2000121998 is about 44722.7235083017. The cubic root of 2000121998 is about 1259.9466673487.

The spelling of 2000121998 in words is "two billion, one hundred twenty-one thousand, nine hundred ninety-eight".