31003331212 has 24 divisors (see below), whose sum is σ = 62027713440. Its totient is φ = 13282631040.

The previous prime is 31003331207. The next prime is 31003331221. The reversal of 31003331212 is 21213330013.

It is a super-2 number, since 2×31003331212² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31003331212.

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, 103339 + ... + 269602.

It is an arithmetic number, because the mean of its divisors is an integer number (2584488060).

Almost surely, 2^31003331212 is an apocalyptic number.

It is an amenable number.

31003331212 is an abundant number, since it is smaller than the sum of its proper divisors (31024382228).

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

31003331212 is a wasteful number, since it uses less digits than its factorization.

31003331212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375921 (or 375919 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 31003331212 its reverse (21213330013), we get a palindrome (52216661225).

The spelling of 31003331212 in words is "thirty-one billion, three million, three hundred thirty-one thousand, two hundred twelve".