31321220212222 has 8 divisors (see below), whose sum is σ = 49745467395936. Its totient is φ = 14739397746912.

The previous prime is 31321220212187. The next prime is 31321220212229. The reversal of 31321220212222 is 22221202212313.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31321220212229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 460606179558 + ... + 460606179625.

It is an arithmetic number, because the mean of its divisors is an integer number (6218183424492).

Almost surely, 2^{31321220212222} is an apocalyptic number.

31321220212222 is a deficient number, since it is larger than the sum of its proper divisors (18424247183714).

31321220212222 is a wasteful number, since it uses less digits than its factorization.

31321220212222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 921212359202.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 31321220212222 its reverse (22221202212313), we get a palindrome (53542422424535).

The spelling of 31321220212222 in words is "thirty-one trillion, three hundred twenty-one billion, two hundred twenty million, two hundred twelve thousand, two hundred twenty-two".