131240121124405 has 8 divisors (see below), whose sum is σ = 166752153899352. Its totient is φ = 98816091199488.

The previous prime is 131240121124339. The next prime is 131240121124417. The reversal of 131240121124405 is 504421121042131.

It can be written as a sum of positive squares in 4 ways, for example, as 53930605312516 + 77309515811889 = 7343746^2 + 8792583^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 131240121124405 - 2¹³ = 131240121116213 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 772000712412 + ... + 772000712581.

It is an arithmetic number, because the mean of its divisors is an integer number (20844019237419).

Almost surely, 2^{131240121124405} is an apocalyptic number.

It is an amenable number.

131240121124405 is a deficient number, since it is larger than the sum of its proper divisors (35512032774947).

131240121124405 is a wasteful number, since it uses less digits than its factorization.

131240121124405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1544001425015.

The product of its (nonzero) digits is 7680, while the sum is 31.

Adding to 131240121124405 its reverse (504421121042131), we get a palindrome (635661242166536).

The spelling of 131240121124405 in words is "one hundred thirty-one trillion, two hundred forty billion, one hundred twenty-one million, one hundred twenty-four thousand, four hundred five".