131212213132 has 144 divisors (see below), whose sum is σ = 315676478880. Its totient is φ = 47187504000.

The previous prime is 131212213091. The next prime is 131212213133. The reversal of 131212213132 is 231312212131.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (131212213133) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4722882 + ... + 4750582.

It is an arithmetic number, because the mean of its divisors is an integer number (2192197770).

Almost surely, 2^131212213132 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 131212213132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (157838239440).

131212213132 is an abundant number, since it is smaller than the sum of its proper divisors (184464265748).

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

131212213132 is a wasteful number, since it uses less digits than its factorization.

131212213132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27769 (or 27734 counting only the distinct ones).

The product of its digits is 432, while the sum is 22.

Adding to 131212213132 its reverse (231312212131), we get a palindrome (362524425263).

The spelling of 131212213132 in words is "one hundred thirty-one billion, two hundred twelve million, two hundred thirteen thousand, one hundred thirty-two".