2021001002 has 4 divisors (see below), whose sum is σ = 3031501506. Its totient is φ = 1010500500.

The previous prime is 2021001001. The next prime is 2021001041. The reversal of 2021001002 is 2001001202.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2001001202 = 2 ⋅1000500601.

It can be written as a sum of positive squares in only one way, i.e., 1258191841 + 762809161 = 35471^2 + 27619^2 .

It is not an unprimeable number, because it can be changed into a prime (2021001001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505250249 + ... + 505250252.

Almost surely, 2^2021001002 is an apocalyptic number.

2021001002 is a deficient number, since it is larger than the sum of its proper divisors (1010500504).

2021001002 is a wasteful number, since it uses less digits than its factorization.

2021001002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1010500503.

The product of its (nonzero) digits is 8, while the sum is 8.

The square root of 2021001002 is about 44955.5447303222. The cubic root of 2021001002 is about 1264.3156378898.

Adding to 2021001002 its reverse (2001001202), we get a palindrome (4022002204).

The spelling of 2021001002 in words is "two billion, twenty-one million, one thousand, two".