31132100203 has 4 divisors (see below), whose sum is σ = 31132478520. Its totient is φ = 31131721888.

The previous prime is 31132100183. The next prime is 31132100243. The reversal of 31132100203 is 30200123113.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 30200123113 = 23 ⋅1313048831.

It is a cyclic number.

It is not a de Polignac number, because 31132100203 - 2⁵ = 31132100171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31132100243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7693 + ... + 249646.

It is an arithmetic number, because the mean of its divisors is an integer number (7783119630).

Almost surely, 2^31132100203 is an apocalyptic number.

31132100203 is a deficient number, since it is larger than the sum of its proper divisors (378317).

31132100203 is a wasteful number, since it uses less digits than its factorization.

31132100203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378316.

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 31132100203 its reverse (30200123113), we get a palindrome (61332223316).

The spelling of 31132100203 in words is "thirty-one billion, one hundred thirty-two million, one hundred thousand, two hundred three".