21111312032113 has 8 divisors (see below), whose sum is σ = 22029243385536. Its totient is φ = 20193384697200.

The previous prime is 21111312032003. The next prime is 21111312032117. The reversal of 21111312032113 is 31123021311112.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21111312032113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21111312032117) 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 7 ways as a sum of consecutive naturals, for example, 15500398 + ... + 16807288.

It is an arithmetic number, because the mean of its divisors is an integer number (2753655423192).

Almost surely, 2^{21111312032113} is an apocalyptic number.

21111312032113 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

21111312032113 is a deficient number, since it is larger than the sum of its proper divisors (917931353423).

21111312032113 is a wasteful number, since it uses less digits than its factorization.

21111312032113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2009255.

The product of its (nonzero) digits is 216, while the sum is 22.

Adding to 21111312032113 its reverse (31123021311112), we get a palindrome (52234333343225).

The spelling of 21111312032113 in words is "twenty-one trillion, one hundred eleven billion, three hundred twelve million, thirty-two thousand, one hundred thirteen".