21003120113103 has 24 divisors (see below), whose sum is σ = 30427465562208. Its totient is φ = 13960734973632.

The previous prime is 21003120113083. The next prime is 21003120113123. The reversal of 21003120113103 is 30131102130012.

It is an interprime number because it is at equal distance from previous prime (21003120113083) and next prime (21003120113123).

It is not a de Polignac number, because 21003120113103 - 2⁹ = 21003120112591 is a prime.

It is a super-2 number, since 2×21003120113103² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21003120113123) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11492926 + ... + 13194452.

It is an arithmetic number, because the mean of its divisors is an integer number (1267811065092).

Almost surely, 2^{21003120113103} is an apocalyptic number.

21003120113103 is a deficient number, since it is larger than the sum of its proper divisors (9424345449105).

21003120113103 is a wasteful number, since it uses less digits than its factorization.

21003120113103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1705583 (or 1705580 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 21003120113103 its reverse (30131102130012), we get a palindrome (51134222243115).

The spelling of 21003120113103 in words is "twenty-one trillion, three billion, one hundred twenty million, one hundred thirteen thousand, one hundred three".