21211411105 has 8 divisors (see below), whose sum is σ = 26950969512. Its totient is φ = 15970944768.

The previous prime is 21211411079. The next prime is 21211411127. The reversal of 21211411105 is 50111411212.

It can be written as a sum of positive squares in 4 ways, for example, as 7589720161 + 13621690944 = 87119^2 + 116712^2 .

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 21211411105 - 2⁵ = 21211411073 is a prime.

It is a super-2 number, since 2×21211411105² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 124772922 + ... + 124773091.

It is an arithmetic number, because the mean of its divisors is an integer number (3368871189).

Almost surely, 2^21211411105 is an apocalyptic number.

It is an amenable number.

21211411105 is a deficient number, since it is larger than the sum of its proper divisors (5739558407).

21211411105 is a wasteful number, since it uses less digits than its factorization.

21211411105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249546035.

The product of its (nonzero) digits is 80, while the sum is 19.

Adding to 21211411105 its reverse (50111411212), we get a palindrome (71322822317).

The spelling of 21211411105 in words is "twenty-one billion, two hundred eleven million, four hundred eleven thousand, one hundred five".