21113343514105 has 32 divisors (see below), whose sum is σ = 27086837073408. Its totient is φ = 15759657408000.

The previous prime is 21113343514079. The next prime is 21113343514121. The reversal of 21113343514105 is 50141534331112.

It is a de Polignac number, because none of the positive numbers 2^k-21113343514105 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28637967 + ... + 29365963.

It is an arithmetic number, because the mean of its divisors is an integer number (846463658544).

Almost surely, 2^{21113343514105} is an apocalyptic number.

It is an amenable number.

21113343514105 is a deficient number, since it is larger than the sum of its proper divisors (5973493559303).

21113343514105 is a wasteful number, since it uses less digits than its factorization.

21113343514105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 734217.

The product of its (nonzero) digits is 21600, while the sum is 34.

Adding to 21113343514105 its reverse (50141534331112), we get a palindrome (71254877845217).

The spelling of 21113343514105 in words is "twenty-one trillion, one hundred thirteen billion, three hundred forty-three million, five hundred fourteen thousand, one hundred five".