21101120107 has 4 divisors (see below), whose sum is σ = 21149852920. Its totient is φ = 21052387296.

The previous prime is 21101120101. The next prime is 21101120113. The reversal of 21101120107 is 70102110112.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (21101120101) and next prime (21101120113).

It is a cyclic number.

It is not a de Polignac number, because 21101120107 - 2⁷ = 21101119979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21101120101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24365757 + ... + 24366622.

It is an arithmetic number, because the mean of its divisors is an integer number (5287463230).

Almost surely, 2^21101120107 is an apocalyptic number.

21101120107 is a deficient number, since it is larger than the sum of its proper divisors (48732813).

21101120107 is an equidigital number, since it uses as much as digits as its factorization.

21101120107 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48732812.

The product of its (nonzero) digits is 28, while the sum is 16.

Adding to 21101120107 its reverse (70102110112), we get a palindrome (91203230219).

The spelling of 21101120107 in words is "twenty-one billion, one hundred one million, one hundred twenty thousand, one hundred seven".