21220231331201 has 8 divisors (see below), whose sum is σ = 25087958224320. Its totient is φ = 17561570756688.

The previous prime is 21220231331197. The next prime is 21220231331251. The reversal of 21220231331201 is 10213313202212.

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

It is not a de Polignac number, because 21220231331201 - 2² = 21220231331197 is a prime.

It is a super-2 number, since 2×21220231331201² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21220231331251) 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, 52266579431 + ... + 52266579836.

It is an arithmetic number, because the mean of its divisors is an integer number (3135994778040).

Almost surely, 2^{21220231331201} is an apocalyptic number.

It is an amenable number.

21220231331201 is a deficient number, since it is larger than the sum of its proper divisors (3867726893119).

21220231331201 is a wasteful number, since it uses less digits than its factorization.

21220231331201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104533159303.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 21220231331201 its reverse (10213313202212), we get a palindrome (31433544533413).

The spelling of 21220231331201 in words is "twenty-one trillion, two hundred twenty billion, two hundred thirty-one million, three hundred thirty-one thousand, two hundred one".