2021002002 has 20 divisors (see below), whose sum is σ = 4528541886. Its totient is φ = 673667280.

The previous prime is 2021001977. The next prime is 2021002031. The reversal of 2021002002 is 2002001202.

It can be written as a sum of positive squares in only one way, i.e., 1898257761 + 122744241 = 43569^2 + 11079^2 .

It is a Harshad number since it is a multiple of its sum of digits (9).

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 6237499 + ... + 6237822.

Almost surely, 2^2021002002 is an apocalyptic number.

2021002002 is an abundant number, since it is smaller than the sum of its proper divisors (2507539884).

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

2021002002 is a wasteful number, since it uses less digits than its factorization.

2021002002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12475335 (or 12475326 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

The square root of 2021002002 is about 44955.5558524194. Note that the first 3 decimals coincide. The cubic root of 2021002002 is about 1264.3158464194.

Adding to 2021002002 its reverse (2002001202), we get a palindrome (4023003204).

The spelling of 2021002002 in words is "two billion, twenty-one million, two thousand, two".