131103331321405 has 16 divisors (see below), whose sum is σ = 166649507558064. Its totient is φ = 98670929310720.

The previous prime is 131103331321397. The next prime is 131103331321477. The reversal of 131103331321405 is 504123133301131.

It can be written as a sum of positive squares in 8 ways, for example, as 440394158884 + 130662937162521 = 663622^2 + 11430789^2 .

It is not a de Polignac number, because 131103331321405 - 2³ = 131103331321397 is a prime.

It is a super-2 number, since 2×131103331321405² (a number of 29 digits) contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 329231202 + ... + 329629171.

It is an arithmetic number, because the mean of its divisors is an integer number (10415594222379).

Almost surely, 2^{131103331321405} is an apocalyptic number.

It is an amenable number.

131103331321405 is a deficient number, since it is larger than the sum of its proper divisors (35546176236659).

131103331321405 is a wasteful number, since it uses less digits than its factorization.

131103331321405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 658862736.

The product of its (nonzero) digits is 9720, while the sum is 31.

Adding to 131103331321405 its reverse (504123133301131), we get a palindrome (635226464622536).

The spelling of 131103331321405 in words is "one hundred thirty-one trillion, one hundred three billion, three hundred thirty-one million, three hundred twenty-one thousand, four hundred five".