21120010113 has 8 divisors (see below), whose sum is σ = 28259519968. Its totient is φ = 14030253504.

The previous prime is 21120010097. The next prime is 21120010127. The reversal of 21120010113 is 31101002112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21120010113 - 2⁴ = 21120010097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21120010913) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12437320 + ... + 12439017.

It is an arithmetic number, because the mean of its divisors is an integer number (3532439996).

Almost surely, 2^21120010113 is an apocalyptic number.

It is an amenable number.

21120010113 is a deficient number, since it is larger than the sum of its proper divisors (7139509855).

21120010113 is a wasteful number, since it uses less digits than its factorization.

21120010113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24876623.

The product of its (nonzero) digits is 12, while the sum is 12.

Adding to 21120010113 its reverse (31101002112), we get a palindrome (52221012225).

The spelling of 21120010113 in words is "twenty-one billion, one hundred twenty million, ten thousand, one hundred thirteen".