1003220023021 has 4 divisors (see below), whose sum is σ = 1003321358044. Its totient is φ = 1003118688000.

The previous prime is 1003220023019. The next prime is 1003220023051. The reversal of 1003220023021 is 1203200223001.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 426206594025 + 577013428996 = 652845^2 + 759614^2 .

It is a cyclic number.

It is not a de Polignac number, because 1003220023021 - 2¹ = 1003220023019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1003220022986 and 1003220023004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1003220023051) 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, 50652660 + ... + 50672461.

It is an arithmetic number, because the mean of its divisors is an integer number (250830339511).

Almost surely, 2^{1003220023021} is an apocalyptic number.

It is an amenable number.

1003220023021 is a deficient number, since it is larger than the sum of its proper divisors (101335023).

1003220023021 is an equidigital number, since it uses as much as digits as its factorization.

1003220023021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101335022.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 1003220023021 its reverse (1203200223001), we get a palindrome (2206420246022).

The spelling of 1003220023021 in words is "one trillion, three billion, two hundred twenty million, twenty-three thousand, twenty-one".