21111032103 has 32 divisors (see below), whose sum is σ = 33646067712. Its totient is φ = 11512063200.

The previous prime is 21111032087. The next prime is 21111032141. The reversal of 21111032103 is 30123011112.

It is a happy number.

It is not a de Polignac number, because 21111032103 - 2⁴ = 21111032087 is a prime.

It is a super-3 number, since 3×21111032103³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21111032603) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 157468 + ... + 258878.

It is an arithmetic number, because the mean of its divisors is an integer number (1051439616).

Almost surely, 2^21111032103 is an apocalyptic number.

21111032103 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

21111032103 is a deficient number, since it is larger than the sum of its proper divisors (12535035609).

21111032103 is a wasteful number, since it uses less digits than its factorization.

21111032103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101875.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 21111032103 its reverse (30123011112), we get a palindrome (51234043215).

The spelling of 21111032103 in words is "twenty-one billion, one hundred eleven million, thirty-two thousand, one hundred three".