21220230001 has 8 divisors (see below), whose sum is σ = 21970276200. Its totient is φ = 20471404800.

The previous prime is 21220229977. The next prime is 21220230011. The reversal of 21220230001 is 10003202212.

It can be written as a sum of positive squares in 4 ways, for example, as 1283072400 + 19937157601 = 35820^2 + 141199^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21220230001 - 2⁵ = 21220229969 is a prime.

It is a super-2 number, since 2×21220230001² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21220230011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 269806 + ... + 339463.

It is an arithmetic number, because the mean of its divisors is an integer number (2746284525).

Almost surely, 2^21220230001 is an apocalyptic number.

It is an amenable number.

21220230001 is a deficient number, since it is larger than the sum of its proper divisors (750046199).

21220230001 is a wasteful number, since it uses less digits than its factorization.

21220230001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 610499.

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 21220230001 its reverse (10003202212), we get a palindrome (31223432213).

The spelling of 21220230001 in words is "twenty-one billion, two hundred twenty million, two hundred thirty thousand, one".