20312102221 has 8 divisors (see below), whose sum is σ = 20839181760. Its totient is φ = 19791116352.

The previous prime is 20312102219. The next prime is 20312102267. The reversal of 20312102221 is 12220121302.

It is a happy number.

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 20312102221 - 2¹ = 20312102219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20312102195 and 20312102204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20312102201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1516665 + ... + 1529998.

It is an arithmetic number, because the mean of its divisors is an integer number (2604897720).

Almost surely, 2^20312102221 is an apocalyptic number.

It is an amenable number.

20312102221 is a deficient number, since it is larger than the sum of its proper divisors (527079539).

20312102221 is a wasteful number, since it uses less digits than its factorization.

20312102221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3046835.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 20312102221 its reverse (12220121302), we get a palindrome (32532223523).

The spelling of 20312102221 in words is "twenty billion, three hundred twelve million, one hundred two thousand, two hundred twenty-one".