21030143103 has 64 divisors (see below), whose sum is σ = 34204979200. Its totient is φ = 12720291840.

The previous prime is 21030143087. The next prime is 21030143119. The reversal of 21030143103 is 30134103012.

It is an interprime number because it is at equal distance from previous prime (21030143087) and next prime (21030143119).

It is not a de Polignac number, because 21030143103 - 2⁴ = 21030143087 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21030143153) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1535775 + ... + 1549407.

It is an arithmetic number, because the mean of its divisors is an integer number (534452800).

Almost surely, 2^21030143103 is an apocalyptic number.

21030143103 is a deficient number, since it is larger than the sum of its proper divisors (13174836097).

21030143103 is a wasteful number, since it uses less digits than its factorization.

21030143103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13789 (or 13783 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 21030143103 its reverse (30134103012), we get a palindrome (51164246115).

The spelling of 21030143103 in words is "twenty-one billion, thirty million, one hundred forty-three thousand, one hundred three".