21031210231003 has 16 divisors (see below), whose sum is σ = 24171215927040. Its totient is φ = 17925114002400.

The previous prime is 21031210231001. The next prime is 21031210231019. The reversal of 21031210231003 is 30013201213012.

It is a cyclic number.

It is not a de Polignac number, because 21031210231003 - 2¹ = 21031210231001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21031210231001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10232568 + ... + 12114778.

It is an arithmetic number, because the mean of its divisors is an integer number (1510700995440).

Almost surely, 2^{21031210231003} is an apocalyptic number.

21031210231003 is a deficient number, since it is larger than the sum of its proper divisors (3140005696037).

21031210231003 is a wasteful number, since it uses less digits than its factorization.

21031210231003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1891218.

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

Adding to 21031210231003 its reverse (30013201213012), we get a palindrome (51044411444015).

The spelling of 21031210231003 in words is "twenty-one trillion, thirty-one billion, two hundred ten million, two hundred thirty-one thousand, three".