31220002212 has 24 divisors (see below), whose sum is σ = 83253339456. Its totient is φ = 8920000608.

The previous prime is 31220002181. The next prime is 31220002217. The reversal of 31220002212 is 21220002213.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 31220002191 and 31220002200.

It is not an unprimeable number, because it can be changed into a prime (31220002217) by changing a digit.

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, 185833263 + ... + 185833430.

It is an arithmetic number, because the mean of its divisors is an integer number (3468889144).

Almost surely, 2^31220002212 is an apocalyptic number.

It is an amenable number.

31220002212 is an abundant number, since it is smaller than the sum of its proper divisors (52033337244).

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

31220002212 is a wasteful number, since it uses less digits than its factorization.

31220002212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 371666707 (or 371666705 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 31220002212 its reverse (21220002213), we get a palindrome (52440004425).

Subtracting from 31220002212 its reverse (21220002213), we obtain a palindrome (9999999999).

The spelling of 31220002212 in words is "thirty-one billion, two hundred twenty million, two thousand, two hundred twelve".