21220313001 has 16 divisors (see below), whose sum is σ = 30587841600. Its totient is φ = 13040077248.

The previous prime is 21220312991. The next prime is 21220313021. The reversal of 21220313001 is 10031302212.

It is not a de Polignac number, because 21220313001 - 2⁷ = 21220312873 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21220313021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5028786 + ... + 5033003.

It is an arithmetic number, because the mean of its divisors is an integer number (1911740100).

Almost surely, 2^21220313001 is an apocalyptic number.

It is an amenable number.

21220313001 is a deficient number, since it is larger than the sum of its proper divisors (9367528599).

21220313001 is a wasteful number, since it uses less digits than its factorization.

21220313001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10061848.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 21220313001 its reverse (10031302212), we get a palindrome (31251615213).

It can be divided in two parts, 21 and 220313001, that added together give a palindrome (220313022).

The spelling of 21220313001 in words is "twenty-one billion, two hundred twenty million, three hundred thirteen thousand, one".