31103203302012 has 96 divisors (see below), whose sum is σ = 80228515336704. Its totient is φ = 9328456192000.

The previous prime is 31103203301977. The next prime is 31103203302047. The reversal of 31103203302012 is 21020330230113.

It is an interprime number because it is at equal distance from previous prime (31103203301977) and next prime (31103203302047).

It is a self number, because there is not a number n which added to its sum of digits gives 31103203302012.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 6667012 + ... + 10327412.

It is an arithmetic number, because the mean of its divisors is an integer number (835713701424).

Almost surely, 2^{31103203302012} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31103203302012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40114257668352).

31103203302012 is an abundant number, since it is smaller than the sum of its proper divisors (49125312034692).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31103203302012 is a wasteful number, since it uses less digits than its factorization.

31103203302012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3662259 (or 3662257 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 31103203302012 its reverse (21020330230113), we get a palindrome (52123533532125).

The spelling of 31103203302012 in words is "thirty-one trillion, one hundred three billion, two hundred three million, three hundred two thousand, twelve".