31212131132222 has 8 divisors (see below), whose sum is σ = 47516975753736. Its totient is φ = 15373139214312.

The previous prime is 31212131132213. The next prime is 31212131132227. The reversal of 31212131132222 is 22223113121213.

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

It is a junction number, because it is equal to n+sod(n) for n = 31212131132191 and 31212131132200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31212131132227) 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, 116463175733 + ... + 116463176000.

It is an arithmetic number, because the mean of its divisors is an integer number (5939621969217).

Almost surely, 2^{31212131132222} is an apocalyptic number.

31212131132222 is a deficient number, since it is larger than the sum of its proper divisors (16304844621514).

31212131132222 is a wasteful number, since it uses less digits than its factorization.

31212131132222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232926351802.

The product of its digits is 1728, while the sum is 26.

Adding to 31212131132222 its reverse (22223113121213), we get a palindrome (53435244253435).

The spelling of 31212131132222 in words is "thirty-one trillion, two hundred twelve billion, one hundred thirty-one million, one hundred thirty-two thousand, two hundred twenty-two".