31203203100011 has 12 divisors (see below), whose sum is σ = 32936737377600. Its totient is φ = 29556598182768.

The previous prime is 31203203099983. The next prime is 31203203100019. The reversal of 31203203100011 is 11000130230213.

It is a de Polignac number, because none of the positive numbers 2^k-31203203100011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31203203100019) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3863291 + ... + 8793828.

It is an arithmetic number, because the mean of its divisors is an integer number (2744728114800).

Almost surely, 2^{31203203100011} is an apocalyptic number.

31203203100011 is a deficient number, since it is larger than the sum of its proper divisors (1733534277589).

31203203100011 is a wasteful number, since it uses less digits than its factorization.

31203203100011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12663986 (or 12663967 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 31203203100011 its reverse (11000130230213), we get a palindrome (42203333330224).

The spelling of 31203203100011 in words is "thirty-one trillion, two hundred three billion, two hundred three million, one hundred thousand, eleven".