131103220305205 has 16 divisors (see below), whose sum is σ = 157847630713344. Its totient is φ = 104533927344000.

The previous prime is 131103220305179. The next prime is 131103220305229. The reversal of 131103220305205 is 502503022301131.

It is not a de Polignac number, because 131103220305205 - 2⁷ = 131103220305077 is a prime.

It is a super-2 number, since 2×131103220305205² (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, 31056921 + ... + 35024830.

It is an arithmetic number, because the mean of its divisors is an integer number (9865476919584).

Almost surely, 2^{131103220305205} is an apocalyptic number.

It is an amenable number.

131103220305205 is a deficient number, since it is larger than the sum of its proper divisors (26744410408139).

131103220305205 is an equidigital number, since it uses as much as digits as its factorization.

131103220305205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66083076.

The product of its (nonzero) digits is 5400, while the sum is 28.

Adding to 131103220305205 its reverse (502503022301131), we get a palindrome (633606242606336).

The spelling of 131103220305205 in words is "one hundred thirty-one trillion, one hundred three billion, two hundred twenty million, three hundred five thousand, two hundred five".