21133020113 has 4 divisors (see below), whose sum is σ = 21134318400. Its totient is φ = 21131721828.

The previous prime is 21133020109. The next prime is 21133020131. The reversal of 21133020113 is 31102033112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21133020113 - 2² = 21133020109 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21133020091 and 21133020100.

It is not an unprimeable number, because it can be changed into a prime (21133020143) 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 3 ways as a sum of consecutive naturals, for example, 624413 + ... + 657386.

It is an arithmetic number, because the mean of its divisors is an integer number (5283579600).

Almost surely, 2^21133020113 is an apocalyptic number.

It is an amenable number.

21133020113 is a deficient number, since it is larger than the sum of its proper divisors (1298287).

21133020113 is a wasteful number, since it uses less digits than its factorization.

21133020113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1298286.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 21133020113 its reverse (31102033112), we get a palindrome (52235053225).

The spelling of 21133020113 in words is "twenty-one billion, one hundred thirty-three million, twenty thousand, one hundred thirteen".