21121303103 has 8 divisors (see below), whose sum is σ = 21181883856. Its totient is φ = 21060777600.

The previous prime is 21121303097. The next prime is 21121303117. The reversal of 21121303103 is 30130312112.

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 21121303103 - 2⁸ = 21121302847 is a prime.

It is a super-2 number, since 2×21121303103² (a number of 21 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 (21121303603) 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, 823493 + ... + 848753.

It is an arithmetic number, because the mean of its divisors is an integer number (2647735482).

Almost surely, 2^21121303103 is an apocalyptic number.

21121303103 is a deficient number, since it is larger than the sum of its proper divisors (60580753).

21121303103 is a wasteful number, since it uses less digits than its factorization.

21121303103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27625.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 21121303103 its reverse (30130312112), we get a palindrome (51251615215).

Subtracting 21121303103 from its reverse (30130312112), we obtain a palindrome (9009009009).

The spelling of 21121303103 in words is "twenty-one billion, one hundred twenty-one million, three hundred three thousand, one hundred three".