21122103113 has 8 divisors (see below), whose sum is σ = 21200726496. Its totient is φ = 21043620000.

The previous prime is 21122103109. The next prime is 21122103137. The reversal of 21122103113 is 31130122112.

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 21122103113 - 2² = 21122103109 is a prime.

It is a super-2 number, since 2×21122103113² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21122103091 and 21122103100.

It is not an unprimeable number, because it can be changed into a prime (21122103913) 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, 271613 + ... + 340613.

It is an arithmetic number, because the mean of its divisors is an integer number (2650090812).

Almost surely, 2^21122103113 is an apocalyptic number.

It is an amenable number.

21122103113 is a deficient number, since it is larger than the sum of its proper divisors (78623383).

21122103113 is an equidigital number, since it uses as much as digits as its factorization.

21122103113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70135.

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

Adding to 21122103113 its reverse (31130122112), we get a palindrome (52252225225).

The spelling of 21122103113 in words is "twenty-one billion, one hundred twenty-two million, one hundred three thousand, one hundred thirteen".