21101022424005 has 16 divisors (see below), whose sum is σ = 34479968557824. Its totient is φ = 11014434399680.

The previous prime is 21101022423991. The next prime is 21101022424007. The reversal of 21101022424005 is 50042422010112.

It is not a de Polignac number, because 21101022424005 - 2⁹ = 21101022423493 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21101022424007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14965263426 + ... + 14965264835.

It is an arithmetic number, because the mean of its divisors is an integer number (2154998034864).

Almost surely, 2^{21101022424005} is an apocalyptic number.

It is an amenable number.

21101022424005 is a deficient number, since it is larger than the sum of its proper divisors (13378946133819).

21101022424005 is a wasteful number, since it uses less digits than its factorization.

21101022424005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29930528316.

The product of its (nonzero) digits is 1280, while the sum is 24.

Adding to 21101022424005 its reverse (50042422010112), we get a palindrome (71143444434117).

The spelling of 21101022424005 in words is "twenty-one trillion, one hundred one billion, twenty-two million, four hundred twenty-four thousand, five".