21101043233411 has 4 divisors (see below), whose sum is σ = 21781722047424. Its totient is φ = 20420364419400.

The previous prime is 21101043233393. The next prime is 21101043233489. The reversal of 21101043233411 is 11433234010112.

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 21101043233411 - 2¹⁰ = 21101043232387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21101043239411) 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, 340339406960 + ... + 340339407021.

It is an arithmetic number, because the mean of its divisors is an integer number (5445430511856).

Almost surely, 2^{21101043233411} is an apocalyptic number.

21101043233411 is a deficient number, since it is larger than the sum of its proper divisors (680678814013).

21101043233411 is an equidigital number, since it uses as much as digits as its factorization.

21101043233411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 680678814012.

The product of its (nonzero) digits is 1728, while the sum is 26.

Adding to 21101043233411 its reverse (11433234010112), we get a palindrome (32534277243523).

The spelling of 21101043233411 in words is "twenty-one trillion, one hundred one billion, forty-three million, two hundred thirty-three thousand, four hundred eleven".