21112103213 has 8 divisors (see below), whose sum is σ = 23189496000. Its totient is φ = 19131333408.

The previous prime is 21112103209. The next prime is 21112103231. The reversal of 21112103213 is 31230121112.

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

It is a cyclic number.

It is not a de Polignac number, because 21112103213 - 2² = 21112103209 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21112103191 and 21112103200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21112103113) 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, 24155288 + ... + 24156161.

It is an arithmetic number, because the mean of its divisors is an integer number (2898687000).

Almost surely, 2^21112103213 is an apocalyptic number.

21112103213 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

21112103213 is a deficient number, since it is larger than the sum of its proper divisors (2077392787).

21112103213 is a wasteful number, since it uses less digits than its factorization.

21112103213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48311491.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 21112103213 its reverse (31230121112), we get a palindrome (52342224325).

The spelling of 21112103213 in words is "twenty-one billion, one hundred twelve million, one hundred three thousand, two hundred thirteen".