1010002010021 has 4 divisors (see below), whose sum is σ = 1010004124032. Its totient is φ = 1009999896012.

The previous prime is 1010002010011. The next prime is 1010002010023. The reversal of 1010002010021 is 1200102000101.

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 a cyclic number.

It is not a de Polignac number, because 1010002010021 - 2⁶ = 1010002009957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1010002009990 and 1010002010008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1010002010023) 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, 37250 + ... + 1421756.

It is an arithmetic number, because the mean of its divisors is an integer number (252501031008).

Almost surely, 2^{1010002010021} is an apocalyptic number.

It is an amenable number.

1010002010021 is a deficient number, since it is larger than the sum of its proper divisors (2114011).

1010002010021 is an equidigital number, since it uses as much as digits as its factorization.

1010002010021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2114010.

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 1010002010021 its reverse (1200102000101), we get a palindrome (2210104010122).

The spelling of 1010002010021 in words is "one trillion, ten billion, two million, ten thousand, twenty-one".