131421240431 has 16 divisors (see below), whose sum is σ = 144931928064. Its totient is φ = 118400746464.

The previous prime is 131421240403. The next prime is 131421240449. The reversal of 131421240431 is 134042124131.

It is not a de Polignac number, because 131421240431 - 2¹⁰ = 131421239407 is a prime.

It is a super-2 number, since 2×131421240431² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 131421240431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131421240481) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 653210 + ... + 830376.

It is an arithmetic number, because the mean of its divisors is an integer number (9058245504).

Almost surely, 2^131421240431 is an apocalyptic number.

131421240431 is a deficient number, since it is larger than the sum of its proper divisors (13510687633).

131421240431 is a wasteful number, since it uses less digits than its factorization.

131421240431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178550.

The product of its (nonzero) digits is 2304, while the sum is 26.

Adding to 131421240431 its reverse (134042124131), we get a palindrome (265463364562).

The spelling of 131421240431 in words is "one hundred thirty-one billion, four hundred twenty-one million, two hundred forty thousand, four hundred thirty-one".