21050223313411 has 4 divisors (see below), whose sum is σ = 21171900904992. Its totient is φ = 20928545721832.

The previous prime is 21050223313403. The next prime is 21050223313421. The reversal of 21050223313411 is 11431332205012.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21050223313411 - 2³ = 21050223313403 is a prime.

It is a super-2 number, since 2×21050223313411² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21050223313411.

It is not an unprimeable number, because it can be changed into a prime (21050223313421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60838795531 + ... + 60838795876.

It is an arithmetic number, because the mean of its divisors is an integer number (5292975226248).

Almost surely, 2^{21050223313411} is an apocalyptic number.

21050223313411 is a deficient number, since it is larger than the sum of its proper divisors (121677591581).

21050223313411 is a wasteful number, since it uses less digits than its factorization.

21050223313411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121677591580.

The product of its (nonzero) digits is 4320, while the sum is 28.

Adding to 21050223313411 its reverse (11431332205012), we get a palindrome (32481555518423).

The spelling of 21050223313411 in words is "twenty-one trillion, fifty billion, two hundred twenty-three million, three hundred thirteen thousand, four hundred eleven".