131244212420 has 12 divisors (see below), whose sum is σ = 275612846124. Its totient is φ = 52497684960.

The previous prime is 131244212399. The next prime is 131244212423. The reversal of 131244212420 is 24212442131.

It can be written as a sum of positive squares in 2 ways, for example, as 100549873216 + 30694339204 = 317096^2 + 175198^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 131244212420.

It is not an unprimeable number, because it can be changed into a prime (131244212423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3281105291 + ... + 3281105330.

It is an arithmetic number, because the mean of its divisors is an integer number (22967737177).

Almost surely, 2^131244212420 is an apocalyptic number.

131244212420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131244212420 is an abundant number, since it is smaller than the sum of its proper divisors (144368633704).

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

131244212420 is a wasteful number, since it uses less digits than its factorization.

131244212420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6562210630 (or 6562210628 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 26.

Adding to 131244212420 its reverse (24212442131), we get a palindrome (155456654551).

The spelling of 131244212420 in words is "one hundred thirty-one billion, two hundred forty-four million, two hundred twelve thousand, four hundred twenty".