21020033113 has 8 divisors (see below), whose sum is σ = 21314162016. Its totient is φ = 20726877600.

The previous prime is 21020033033. The next prime is 21020033123. The reversal of 21020033113 is 31133002012.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21020033113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21020033123) 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, 199803 + ... + 286288.

It is an arithmetic number, because the mean of its divisors is an integer number (2664270252).

Almost surely, 2^21020033113 is an apocalyptic number.

It is an amenable number.

21020033113 is a deficient number, since it is larger than the sum of its proper divisors (294128903).

21020033113 is an equidigital number, since it uses as much as digits as its factorization.

21020033113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 486695.

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 21020033113 its reverse (31133002012), we get a palindrome (52153035125).

The spelling of 21020033113 in words is "twenty-one billion, twenty million, thirty-three thousand, one hundred thirteen".