31305433521212 has 96 divisors (see below), whose sum is σ = 58733369593920. Its totient is φ = 14574457497600.

The previous prime is 31305433521199. The next prime is 31305433521293. The reversal of 31305433521212 is 21212533450313.

It is a super-2 number, since 2×31305433521212² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 188162462 + ... + 188328762.

It is an arithmetic number, because the mean of its divisors is an integer number (611805933270).

Almost surely, 2^{31305433521212} is an apocalyptic number.

It is an amenable number.

31305433521212 is a deficient number, since it is larger than the sum of its proper divisors (27427936072708).

31305433521212 is a wasteful number, since it uses less digits than its factorization.

31305433521212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166911 (or 166909 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 35.

Adding to 31305433521212 its reverse (21212533450313), we get a palindrome (52517966971525).

The spelling of 31305433521212 in words is "thirty-one trillion, three hundred five billion, four hundred thirty-three million, five hundred twenty-one thousand, two hundred twelve".