21321231030203 has 16 divisors (see below), whose sum is σ = 23351884765440. Its totient is φ = 19347577815456.

The previous prime is 21321231030157. The next prime is 21321231030233. The reversal of 21321231030203 is 30203013212312.

It is a cyclic number.

It is not a de Polignac number, because 21321231030203 - 2⁸ = 21321231029947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21321231030233) 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, 24708293 + ... + 25556646.

It is an arithmetic number, because the mean of its divisors is an integer number (1459492797840).

Almost surely, 2^{21321231030203} is an apocalyptic number.

21321231030203 is a deficient number, since it is larger than the sum of its proper divisors (2030653735237).

21321231030203 is a wasteful number, since it uses less digits than its factorization.

21321231030203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50265506.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 21321231030203 its reverse (30203013212312), we get a palindrome (51524244242515).

The spelling of 21321231030203 in words is "twenty-one trillion, three hundred twenty-one billion, two hundred thirty-one million, thirty thousand, two hundred three".