21361230342105 has 32 divisors (see below), whose sum is σ = 34318095759360. Its totient is φ = 11345957592000.

The previous prime is 21361230342043. The next prime is 21361230342113. The reversal of 21361230342105 is 50124303216312.

It is not a de Polignac number, because 21361230342105 - 2³³ = 21352640407513 is a prime.

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, 32745006 + ... + 33390984.

It is an arithmetic number, because the mean of its divisors is an integer number (1072440492480).

Almost surely, 2^{21361230342105} is an apocalyptic number.

It is an amenable number.

21361230342105 is a deficient number, since it is larger than the sum of its proper divisors (12956865417255).

21361230342105 is a wasteful number, since it uses less digits than its factorization.

21361230342105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 655021.

The product of its (nonzero) digits is 25920, while the sum is 33.

Adding to 21361230342105 its reverse (50124303216312), we get a palindrome (71485533558417).

The spelling of 21361230342105 in words is "twenty-one trillion, three hundred sixty-one billion, two hundred thirty million, three hundred forty-two thousand, one hundred five".