21020334411 has 8 divisors (see below), whose sum is σ = 28027831104. Its totient is φ = 14013197000.

The previous prime is 21020334407. The next prime is 21020334427. The reversal of 21020334411 is 11443302012.

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 21020334411 - 2² = 21020334407 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21020334481) 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, 110560 + ... + 232946.

It is an arithmetic number, because the mean of its divisors is an integer number (3503478888).

Almost surely, 2^21020334411 is an apocalyptic number.

21020334411 is a deficient number, since it is larger than the sum of its proper divisors (7007496693).

21020334411 is a wasteful number, since it uses less digits than its factorization.

21020334411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179641.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 21020334411 its reverse (11443302012), we get a palindrome (32463636423).

The spelling of 21020334411 in words is "twenty-one billion, twenty million, three hundred thirty-four thousand, four hundred eleven".