21220131201 has 8 divisors (see below), whose sum is σ = 28451573280. Its totient is φ = 14067721632.

The previous prime is 21220131193. The next prime is 21220131203. The reversal of 21220131201 is 10213102212.

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

It is not a de Polignac number, because 21220131201 - 2³ = 21220131193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21220131203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19757500 + ... + 19758573.

It is an arithmetic number, because the mean of its divisors is an integer number (3556446660).

Almost surely, 2^21220131201 is an apocalyptic number.

It is an amenable number.

21220131201 is a deficient number, since it is larger than the sum of its proper divisors (7231442079).

21220131201 is a wasteful number, since it uses less digits than its factorization.

21220131201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39516255.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 21220131201 its reverse (10213102212), we get a palindrome (31433233413).

The spelling of 21220131201 in words is "twenty-one billion, two hundred twenty million, one hundred thirty-one thousand, two hundred one".