21320221301 has 8 divisors (see below), whose sum is σ = 21605383680. Its totient is φ = 21035441232.

The previous prime is 21320221283. The next prime is 21320221327. The reversal of 21320221301 is 10312202312.

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

It is not a de Polignac number, because 21320221301 - 2²⁶ = 21253112437 is a prime.

It is a super-2 number, since 2×21320221301² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21320221301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21320121301) 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, 17591 + ... + 207243.

It is an arithmetic number, because the mean of its divisors is an integer number (2700672960).

Almost surely, 2^21320221301 is an apocalyptic number.

It is an amenable number.

21320221301 is a deficient number, since it is larger than the sum of its proper divisors (285162379).

21320221301 is a wasteful number, since it uses less digits than its factorization.

21320221301 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191155.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 21320221301 its reverse (10312202312), we get a palindrome (31632423613).

The spelling of 21320221301 in words is "twenty-one billion, three hundred twenty million, two hundred twenty-one thousand, three hundred one".