21303012220321 has 8 divisors (see below), whose sum is σ = 23681760483584. Its totient is φ = 19029986102160.

The previous prime is 21303012220279. The next prime is 21303012220327. The reversal of 21303012220321 is 12302221030312.

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 21303012220321 - 2⁹ = 21303012219809 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21303012220292 and 21303012220301.

It is not an unprimeable number, because it can be changed into a prime (21303012220327) 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, 26430535851 + ... + 26430536656.

It is an arithmetic number, because the mean of its divisors is an integer number (2960220060448).

Almost surely, 2^{21303012220321} is an apocalyptic number.

It is an amenable number.

21303012220321 is a deficient number, since it is larger than the sum of its proper divisors (2378748263263).

21303012220321 is a wasteful number, since it uses less digits than its factorization.

21303012220321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52861072551.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 21303012220321 its reverse (12302221030312), we get a palindrome (33605233250633).

The spelling of 21303012220321 in words is "twenty-one trillion, three hundred three billion, twelve million, two hundred twenty thousand, three hundred twenty-one".