10130020021 has 4 divisors (see below), whose sum is σ = 11050930944. Its totient is φ = 9209109100.

The previous prime is 10130019997. The next prime is 10130020037. The reversal of 10130020021 is 12002003101.

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 10130020021 - 2⁹ = 10130019509 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 (10130020051) 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, 460455445 + ... + 460455466.

It is an arithmetic number, because the mean of its divisors is an integer number (2762732736).

Almost surely, 2^10130020021 is an apocalyptic number.

10130020021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

10130020021 is a deficient number, since it is larger than the sum of its proper divisors (920910923).

10130020021 is an equidigital number, since it uses as much as digits as its factorization.

10130020021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 920910922.

The product of its (nonzero) digits is 12, while the sum is 10.

Adding to 10130020021 its reverse (12002003101), we get a palindrome (22132023122).

It can be divided in two parts, 10 and 130020021, that added together give a palindrome (130020031).

The spelling of 10130020021 in words is "ten billion, one hundred thirty million, twenty thousand, twenty-one".