2021121008 has 10 divisors (see below), whose sum is σ = 3915921984. Its totient is φ = 1010560496.

The previous prime is 2021120989. The next prime is 2021121017. The reversal of 2021121008 is 8001211202.

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 as a sum of consecutive naturals, namely, 63160016 + ... + 63160047.

Almost surely, 2^2021121008 is an apocalyptic number.

It is an amenable number.

2021121008 is a deficient number, since it is larger than the sum of its proper divisors (1894800976).

2021121008 is a wasteful number, since it uses less digits than its factorization.

2021121008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126320071 (or 126320065 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

The square root of 2021121008 is about 44956.8794290707. The cubic root of 2021121008 is about 1264.3406621986.

The spelling of 2021121008 in words is "two billion, twenty-one million, one hundred twenty-one thousand, eight".