10000021210021 has 4 divisors (see below), whose sum is σ = 10000033884544. Its totient is φ = 10000008535500.

The previous prime is 10000021209961. The next prime is 10000021210051. The reversal of 10000021210021 is 12001212000001.

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-10000021210021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10000021210051) 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, 5069205 + ... + 6759946.

It is an arithmetic number, because the mean of its divisors is an integer number (2500008471136).

Almost surely, 2^{10000021210021} is an apocalyptic number.

It is an amenable number.

10000021210021 is a deficient number, since it is larger than the sum of its proper divisors (12674523).

10000021210021 is an equidigital number, since it uses as much as digits as its factorization.

10000021210021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12674522.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 10000021210021 its reverse (12001212000001), we get a palindrome (22001233210022).

The spelling of 10000021210021 in words is "ten trillion, twenty-one million, two hundred ten thousand, twenty-one".