31330221231212 has 24 divisors (see below), whose sum is σ = 55108314510480. Its totient is φ = 15584994613440.

The previous prime is 31330221231157. The next prime is 31330221231247. The reversal of 31330221231212 is 21213212203313.

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 7 ways as a sum of consecutive naturals, for example, 20163662 + ... + 21661802.

It is an arithmetic number, because the mean of its divisors is an integer number (2296179771270).

Almost surely, 2^{31330221231212} is an apocalyptic number.

It is an amenable number.

31330221231212 is a deficient number, since it is larger than the sum of its proper divisors (23778093279268).

31330221231212 is a wasteful number, since it uses less digits than its factorization.

31330221231212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1524881 (or 1524879 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 26.

Adding to 31330221231212 its reverse (21213212203313), we get a palindrome (52543433434525).

The spelling of 31330221231212 in words is "thirty-one trillion, three hundred thirty billion, two hundred twenty-one million, two hundred thirty-one thousand, two hundred twelve".