31103212112101 has 4 divisors (see below), whose sum is σ = 32106541535104. Its totient is φ = 30099882689100.

The previous prime is 31103212112057. The next prime is 31103212112111. The reversal of 31103212112101 is 10121121230113.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 31103212112101 - 2¹⁹ = 31103211587813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31103212112111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 501664711455 + ... + 501664711516.

It is an arithmetic number, because the mean of its divisors is an integer number (8026635383776).

Almost surely, 2^{31103212112101} is an apocalyptic number.

31103212112101 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

31103212112101 is a deficient number, since it is larger than the sum of its proper divisors (1003329423003).

31103212112101 is a wasteful number, since it uses less digits than its factorization.

31103212112101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1003329423002.

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 31103212112101 its reverse (10121121230113), we get a palindrome (41224333342214).

The spelling of 31103212112101 in words is "thirty-one trillion, one hundred three billion, two hundred twelve million, one hundred twelve thousand, one hundred one".