21320220001 has 8 divisors (see below), whose sum is σ = 22417015104. Its totient is φ = 20237577360.

The previous prime is 21320219897. The next prime is 21320220007. The reversal of 21320220001 is 10002202312.

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 21320220001 - 2⁹ = 21320219489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21320220007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3535026 + ... + 3541051.

It is an arithmetic number, because the mean of its divisors is an integer number (2802126888).

Almost surely, 2^21320220001 is an apocalyptic number.

It is an amenable number.

21320220001 is a deficient number, since it is larger than the sum of its proper divisors (1096795103).

21320220001 is a wasteful number, since it uses less digits than its factorization.

21320220001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7076231.

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

Adding to 21320220001 its reverse (10002202312), we get a palindrome (31322422313).

The spelling of 21320220001 in words is "twenty-one billion, three hundred twenty million, two hundred twenty thousand, one".