1000121208 has 32 divisors (see below), whose sum is σ = 2504597760. Its totient is φ = 332801120.

The previous prime is 1000121197. The next prime is 1000121257. The reversal of 1000121208 is 8021210001.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21408 + ... + 49583.

It is an arithmetic number, because the mean of its divisors is an integer number (78268680).

Almost surely, 2^1000121208 is an apocalyptic number.

It is an amenable number.

1000121208 is an abundant number, since it is smaller than the sum of its proper divisors (1504476552).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1000121208 is a wasteful number, since it uses less digits than its factorization.

1000121208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71587 (or 71583 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

The square root of 1000121208 is about 31624.6930103677. The cubic root of 1000121208 is about 1000.0404010344.

Adding to 1000121208 its reverse (8021210001), we get a palindrome (9021331209).

The spelling of 1000121208 in words is "one billion, one hundred twenty-one thousand, two hundred eight".