131401322421220 has 24 divisors (see below), whose sum is σ = 275969226557304. Its totient is φ = 52555490973696.

The previous prime is 131401322421217. The next prime is 131401322421277. The reversal of 131401322421220 is 22124223104131.

It can be written as a sum of positive squares in 4 ways, for example, as 52630265827584 + 78771056593636 = 7254672^2 + 8875306^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 314660799 + ... + 315078118.

It is an arithmetic number, because the mean of its divisors is an integer number (11498717773221).

Almost surely, 2^{131401322421220} is an apocalyptic number.

131401322421220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131401322421220 is an abundant number, since it is smaller than the sum of its proper divisors (144567904136084).

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

131401322421220 is a wasteful number, since it uses less digits than its factorization.

131401322421220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 629749359 (or 629749357 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

Adding to 131401322421220 its reverse (22124223104131), we get a palindrome (153525545525351).

The spelling of 131401322421220 in words is "one hundred thirty-one trillion, four hundred one billion, three hundred twenty-two million, four hundred twenty-one thousand, two hundred twenty".