1000102021 has 4 divisors (see below), whose sum is σ = 1000168000. Its totient is φ = 1000036044.

The previous prime is 1000102007. The next prime is 1000102039. The reversal of 1000102021 is 1202010001.

1000102021 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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1202010001 = 397 ⋅3027733.

It is a cyclic number.

It is not a de Polignac number, because 1000102021 - 2²³ = 991713413 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1000101995 and 1000102013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000102121) 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, 2410 + ... + 44788.

It is an arithmetic number, because the mean of its divisors is an integer number (250042000).

Almost surely, 2^1000102021 is an apocalyptic number.

It is an amenable number.

1000102021 is a deficient number, since it is larger than the sum of its proper divisors (65979).

1000102021 is an equidigital number, since it uses as much as digits as its factorization.

1000102021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65978.

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

The square root of 1000102021 is about 31624.3896541894. The cubic root of 1000102021 is about 1000.0340058436.

Adding to 1000102021 its reverse (1202010001), we get a palindrome (2202112022).

The spelling of 1000102021 in words is "one billion, one hundred two thousand, twenty-one".