21031431000103 has 8 divisors (see below), whose sum is σ = 21290713215408. Its totient is φ = 20772289058304.

The previous prime is 21031431000101. The next prime is 21031431000157. The reversal of 21031431000103 is 30100013413012.

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 21031431000103 - 2¹ = 21031431000101 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 (21031431000101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34766650 + ... + 35366407.

It is an arithmetic number, because the mean of its divisors is an integer number (2661339151926).

Almost surely, 2^{21031431000103} is an apocalyptic number.

21031431000103 is a deficient number, since it is larger than the sum of its proper divisors (259282215305).

21031431000103 is an equidigital number, since it uses as much as digits as its factorization.

21031431000103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70136753.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 21031431000103 its reverse (30100013413012), we get a palindrome (51131444413115).

The spelling of 21031431000103 in words is "twenty-one trillion, thirty-one billion, four hundred thirty-one million, one hundred three", and thus it is an aban number.