1010002021 has 4 divisors (see below), whose sum is σ = 1154288032. Its totient is φ = 865716012.

The previous prime is 1010002001. The next prime is 1010002031. The reversal of 1010002021 is 1202000101.

1010002021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1010002021 - 2¹¹ = 1009999973 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (7), and also a Moran number because the ratio is a prime number: 144286003 = 1010002021 / (1 + 0 + 1 + 0 + 0 + 0 + 2 + 0 + 2 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1010001995 and 1010002013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1010002001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72142995 + ... + 72143008.

It is an arithmetic number, because the mean of its divisors is an integer number (288572008).

Almost surely, 2^1010002021 is an apocalyptic number.

It is an amenable number.

1010002021 is a deficient number, since it is larger than the sum of its proper divisors (144286011).

1010002021 is an equidigital number, since it uses as much as digits as its factorization.

1010002021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144286010.

The product of its (nonzero) digits is 4, while the sum is 7.

The square root of 1010002021 is about 31780.5289603556. The cubic root of 1010002021 is about 1003.3229527543.

Adding to 1010002021 its reverse (1202000101), we get a palindrome (2212002122).

The spelling of 1010002021 in words is "one billion, ten million, two thousand, twenty-one".