31211031123103 has 8 divisors (see below), whose sum is σ = 33612794024096. Its totient is φ = 28809398844000.

The previous prime is 31211031123091. The next prime is 31211031123113. The reversal of 31211031123103 is 30132113011213.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31211031123103 - 2²¹ = 31211029025951 is a prime.

It is a super-2 number, since 2×31211031123103² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31211031123113) 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 7 ways as a sum of consecutive naturals, for example, 32158923 + ... + 33115228.

It is an arithmetic number, because the mean of its divisors is an integer number (4201599253012).

Almost surely, 2^{31211031123103} is an apocalyptic number.

31211031123103 is a deficient number, since it is larger than the sum of its proper divisors (2401762900993).

31211031123103 is a wasteful number, since it uses less digits than its factorization.

31211031123103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65310945.

The product of its (nonzero) digits is 324, while the sum is 22.

Adding to 31211031123103 its reverse (30132113011213), we get a palindrome (61343144134316).

The spelling of 31211031123103 in words is "thirty-one trillion, two hundred eleven billion, thirty-one million, one hundred twenty-three thousand, one hundred three".