31212103222 has 4 divisors (see below), whose sum is σ = 46818154836. Its totient is φ = 15606051610.

The previous prime is 31212103217. The next prime is 31212103231. The reversal of 31212103222 is 22230121213.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22230121213 = 17 ⋅1307654189.

It is a self number, because there is not a number n which added to its sum of digits gives 31212103222.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7803025804 + ... + 7803025807.

It is an arithmetic number, because the mean of its divisors is an integer number (11704538709).

Almost surely, 2^31212103222 is an apocalyptic number.

31212103222 is a deficient number, since it is larger than the sum of its proper divisors (15606051614).

31212103222 is a wasteful number, since it uses less digits than its factorization.

31212103222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15606051613.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 31212103222 its reverse (22230121213), we get a palindrome (53442224435).

The spelling of 31212103222 in words is "thirty-one billion, two hundred twelve million, one hundred three thousand, two hundred twenty-two".