21131313232203 has 24 divisors (see below), whose sum is σ = 31699007307968. Its totient is φ = 13554552865392.

The previous prime is 21131313232181. The next prime is 21131313232229. The reversal of 21131313232203 is 30223231313112.

21131313232203 is a `hidden beast` number, since 2 + 1 + 1 + 3 + 131 + 323 + 2 + 203 = 666.

It is not a de Polignac number, because 21131313232203 - 2⁵ = 21131313232171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21131313232243) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 407458225 + ... + 407510082.

Almost surely, 2^{21131313232203} is an apocalyptic number.

21131313232203 is a deficient number, since it is larger than the sum of its proper divisors (10567694075765).

21131313232203 is a wasteful number, since it uses less digits than its factorization.

21131313232203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 814968423 (or 814968420 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 27.

Adding to 21131313232203 its reverse (30223231313112), we get a palindrome (51354544545315).

The spelling of 21131313232203 in words is "twenty-one trillion, one hundred thirty-one billion, three hundred thirteen million, two hundred thirty-two thousand, two hundred three".