21331023103 has 8 divisors (see below), whose sum is σ = 23021067888. Its totient is φ = 19648006464.

The previous prime is 21331023079. The next prime is 21331023127. The reversal of 21331023103 is 30132013312.

It is an interprime number because it is at equal distance from previous prime (21331023079) and next prime (21331023127).

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 21331023103 - 2⁹ = 21331022591 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21331023503) 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, 1750726 + ... + 1762867.

It is an arithmetic number, because the mean of its divisors is an integer number (2877633486).

Almost surely, 2^21331023103 is an apocalyptic number.

21331023103 is a deficient number, since it is larger than the sum of its proper divisors (1690044785).

21331023103 is a wasteful number, since it uses less digits than its factorization.

21331023103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3514073.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 21331023103 its reverse (30132013312), we get a palindrome (51463036415).

The spelling of 21331023103 in words is "twenty-one billion, three hundred thirty-one million, twenty-three thousand, one hundred three".