20211232113 has 6 divisors (see below), whose sum is σ = 29194001954. Its totient is φ = 13474154736.

The previous prime is 20211232091. The next prime is 20211232123. The reversal of 20211232113 is 31123211202.

It can be written as a sum of positive squares in only one way, i.e., 20190136464 + 21095649 = 142092^2 + 4593^2 .

It is not a de Polignac number, because 20211232113 - 2³² = 15916264817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20211232123) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1122846220 + ... + 1122846237.

Almost surely, 2^20211232113 is an apocalyptic number.

It is an amenable number.

20211232113 is a deficient number, since it is larger than the sum of its proper divisors (8982769841).

20211232113 is a wasteful number, since it uses less digits than its factorization.

20211232113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2245692463 (or 2245692460 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 20211232113 its reverse (31123211202), we get a palindrome (51334443315).

The spelling of 20211232113 in words is "twenty billion, two hundred eleven million, two hundred thirty-two thousand, one hundred thirteen".