10003220021 has 4 divisors (see below), whose sum is σ = 10040132544. Its totient is φ = 9966307500.

The previous prime is 10003219999. The next prime is 10003220039. The reversal of 10003220021 is 12002230001.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12002230001 = 23 ⋅521836087.

It is a cyclic number.

It is not a de Polignac number, because 10003220021 - 2⁶ = 10003219957 is a prime.

It is a super-3 number, since 3×10003220021³ (a number of 31 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10003219984 and 10003220011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10003220041) 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, 18455855 + ... + 18456396.

It is an arithmetic number, because the mean of its divisors is an integer number (2510033136).

Almost surely, 2^10003220021 is an apocalyptic number.

It is an amenable number.

10003220021 is a deficient number, since it is larger than the sum of its proper divisors (36912523).

10003220021 is an equidigital number, since it uses as much as digits as its factorization.

10003220021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36912522.

The product of its (nonzero) digits is 24, while the sum is 11.

Adding to 10003220021 its reverse (12002230001), we get a palindrome (22005450022).

The spelling of 10003220021 in words is "ten billion, three million, two hundred twenty thousand, twenty-one".