22013203021 has 4 divisors (see below), whose sum is σ = 22608154492. Its totient is φ = 21418251552.

The previous prime is 22013203007. The next prime is 22013203033. The reversal of 22013203021 is 12030231022.

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 17222625225 + 4790577796 = 131235^2 + 69214^2 .

It is a cyclic number.

It is not a de Polignac number, because 22013203021 - 2¹¹ = 22013200973 is a prime.

It is a super-2 number, since 2×22013203021² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22013202986 and 22013203004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22013203001) 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, 297475680 + ... + 297475753.

It is an arithmetic number, because the mean of its divisors is an integer number (5652038623).

Almost surely, 2^22013203021 is an apocalyptic number.

It is an amenable number.

22013203021 is a deficient number, since it is larger than the sum of its proper divisors (594951471).

22013203021 is an equidigital number, since it uses as much as digits as its factorization.

22013203021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 594951470.

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

Adding to 22013203021 its reverse (12030231022), we get a palindrome (34043434043).

The spelling of 22013203021 in words is "twenty-two billion, thirteen million, two hundred three thousand, twenty-one".