31212103133332 has 24 divisors (see below), whose sum is σ = 59593949079840. Its totient is φ = 14185603716960.

The previous prime is 31212103133297. The next prime is 31212103133359. The reversal of 31212103133332 is 23333130121213.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 31212103133332.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 42529258 + ... + 43256929.

It is an arithmetic number, because the mean of its divisors is an integer number (2483081211660).

Almost surely, 2^{31212103133332} is an apocalyptic number.

It is an amenable number.

31212103133332 is a deficient number, since it is larger than the sum of its proper divisors (28381845946508).

31212103133332 is a wasteful number, since it uses less digits than its factorization.

31212103133332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85794471 (or 85794469 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 28.

Adding to 31212103133332 its reverse (23333130121213), we get a palindrome (54545233254545).

The spelling of 31212103133332 in words is "thirty-one trillion, two hundred twelve billion, one hundred three million, one hundred thirty-three thousand, three hundred thirty-two".