131211222210 has 48 divisors (see below), whose sum is σ = 343835421696. Its totient is φ = 34714147104.

The previous prime is 131211222199. The next prime is 131211222343. The reversal of 131211222210 is 12222112131.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5728344 + ... + 5751203.

It is an arithmetic number, because the mean of its divisors is an integer number (7163237952).

Almost surely, 2^131211222210 is an apocalyptic number.

131211222210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

131211222210 is an abundant number, since it is smaller than the sum of its proper divisors (212624199486).

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

131211222210 is a wasteful number, since it uses less digits than its factorization.

131211222210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11479687 (or 11479684 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 131211222210 its reverse (12222112131), we get a palindrome (143433334341).

The spelling of 131211222210 in words is "one hundred thirty-one billion, two hundred eleven million, two hundred twenty-two thousand, two hundred ten".