31100012012203 has 4 divisors (see below), whose sum is σ = 31526039574088. Its totient is φ = 30673984450320.

The previous prime is 31100012012137. The next prime is 31100012012239. The reversal of 31100012012203 is 30221021000113.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 31100012012203 - 2¹⁷ = 31100011881131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31100012012263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 213013780833 + ... + 213013780978.

It is an arithmetic number, because the mean of its divisors is an integer number (7881509893522).

Almost surely, 2^{31100012012203} is an apocalyptic number.

31100012012203 is a deficient number, since it is larger than the sum of its proper divisors (426027561885).

31100012012203 is an equidigital number, since it uses as much as digits as its factorization.

31100012012203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426027561884.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 31100012012203 its reverse (30221021000113), we get a palindrome (61321033012316).

The spelling of 31100012012203 in words is "thirty-one trillion, one hundred billion, twelve million, twelve thousand, two hundred three".