10002112021 has 4 divisors (see below), whose sum is σ = 10911394944. Its totient is φ = 9092829100.

The previous prime is 10002111961. The next prime is 10002112067. The reversal of 10002112021 is 12021120001.

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 10002112021 - 2²³ = 9993723413 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10002111989 and 10002112007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10002112321) 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, 454641445 + ... + 454641466.

It is an arithmetic number, because the mean of its divisors is an integer number (2727848736).

Almost surely, 2^10002112021 is an apocalyptic number.

10002112021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

10002112021 is a deficient number, since it is larger than the sum of its proper divisors (909282923).

10002112021 is an equidigital number, since it uses as much as digits as its factorization.

10002112021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 909282922.

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

Adding to 10002112021 its reverse (12021120001), we get a palindrome (22023232022).

The spelling of 10002112021 in words is "ten billion, two million, one hundred twelve thousand, twenty-one".