21242110113 has 88 divisors (see below), whose sum is σ = 38569644288. Its totient is φ = 11420548992.

The previous prime is 21242110091. The next prime is 21242110117. The reversal of 21242110113 is 31101124212.

It is not a de Polignac number, because 21242110113 - 2⁵ = 21242110081 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21242110117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 87 ways as a sum of consecutive naturals, for example, 7025320 + ... + 7028342.

Almost surely, 2^21242110113 is an apocalyptic number.

It is an amenable number.

21242110113 is a deficient number, since it is larger than the sum of its proper divisors (17327534175).

21242110113 is an frugal number, since it uses more digits than its factorization.

21242110113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3077 (or 3050 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 21242110113 its reverse (31101124212), we get a palindrome (52343234325).

The spelling of 21242110113 in words is "twenty-one billion, two hundred forty-two million, one hundred ten thousand, one hundred thirteen".