21311201030203 has 16 divisors (see below), whose sum is σ = 24664209684480. Its totient is φ = 18035334940896.

The previous prime is 21311201030153. The next prime is 21311201030237. The reversal of 21311201030203 is 30203010211312.

It is not a de Polignac number, because 21311201030203 - 2³³ = 21302611095611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21311201030263) 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, 101119725 + ... + 101330257.

It is an arithmetic number, because the mean of its divisors is an integer number (1541513105280).

Almost surely, 2^{21311201030203} is an apocalyptic number.

21311201030203 is a deficient number, since it is larger than the sum of its proper divisors (3353008654277).

21311201030203 is a wasteful number, since it uses less digits than its factorization.

21311201030203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393666.

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

Adding to 21311201030203 its reverse (30203010211312), we get a palindrome (51514211241515).

The spelling of 21311201030203 in words is "twenty-one trillion, three hundred eleven billion, two hundred one million, thirty thousand, two hundred three".