10042010021 has 4 divisors (see below), whose sum is σ = 10043236512. Its totient is φ = 10040783532.

The previous prime is 10042009963. The next prime is 10042010023. The reversal of 10042010021 is 12001024001.

10042010021 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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10042010021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10042009984 and 10042010011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10042010023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 600881 + ... + 617366.

It is an arithmetic number, because the mean of its divisors is an integer number (2510809128).

Almost surely, 2^10042010021 is an apocalyptic number.

It is an amenable number.

10042010021 is a deficient number, since it is larger than the sum of its proper divisors (1226491).

10042010021 is an equidigital number, since it uses as much as digits as its factorization.

10042010021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1226490.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 10042010021 its reverse (12001024001), we get a palindrome (22043034022).

The spelling of 10042010021 in words is "ten billion, forty-two million, ten thousand, twenty-one".