131103111405 has 64 divisors (see below), whose sum is σ = 249578519040. Its totient is φ = 57497416704.

The previous prime is 131103111389. The next prime is 131103111413. The reversal of 131103111405 is 504111301131.

It is not a de Polignac number, because 131103111405 - 2⁴ = 131103111389 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 340947 + ... + 615183.

It is an arithmetic number, because the mean of its divisors is an integer number (3899664360).

Almost surely, 2^131103111405 is an apocalyptic number.

131103111405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

131103111405 is a deficient number, since it is larger than the sum of its proper divisors (118475407635).

131103111405 is a wasteful number, since it uses less digits than its factorization.

131103111405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274438.

The product of its (nonzero) digits is 180, while the sum is 21.

Adding to 131103111405 its reverse (504111301131), we get a palindrome (635214412536).

The spelling of 131103111405 in words is "one hundred thirty-one billion, one hundred three million, one hundred eleven thousand, four hundred five".