21121120012103 has 8 divisors (see below), whose sum is σ = 21158901387456. Its totient is φ = 21083356245600.

The previous prime is 21121120012099. The next prime is 21121120012151. The reversal of 21121120012103 is 30121002112112.

It is a happy number.

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 21121120012103 - 2² = 21121120012099 is a prime.

It is a super-2 number, since 2×21121120012103² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21121120012703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1999976 + ... + 6800157.

It is an arithmetic number, because the mean of its divisors is an integer number (2644862673432).

Almost surely, 2^{21121120012103} is an apocalyptic number.

21121120012103 is a deficient number, since it is larger than the sum of its proper divisors (37781375353).

21121120012103 is an equidigital number, since it uses as much as digits as its factorization.

21121120012103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8804425.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 21121120012103 its reverse (30121002112112), we get a palindrome (51242122124215).

The spelling of 21121120012103 in words is "twenty-one trillion, one hundred twenty-one billion, one hundred twenty million, twelve thousand, one hundred three".