131231222222 has 16 divisors (see below), whose sum is σ = 206437593600. Its totient is φ = 62447363352.

The previous prime is 131231222219. The next prime is 131231222231. The reversal of 131231222222 is 222222132131.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7158818 + ... + 7177125.

It is an arithmetic number, because the mean of its divisors is an integer number (12902349600).

Almost surely, 2^131231222222 is an apocalyptic number.

131231222222 is a deficient number, since it is larger than the sum of its proper divisors (75206371378).

131231222222 is a wasteful number, since it uses less digits than its factorization.

131231222222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14336167.

The product of its digits is 1152, while the sum is 23.

Adding to 131231222222 its reverse (222222132131), we get a palindrome (353453354353).

Subtracting 131231222222 from its reverse (222222132131), we obtain a palindrome (90990909909).

The spelling of 131231222222 in words is "one hundred thirty-one billion, two hundred thirty-one million, two hundred twenty-two thousand, two hundred twenty-two".