131123220231 has 8 divisors (see below), whose sum is σ = 174930699760. Its totient is φ = 87365610432.

The previous prime is 131123220209. The next prime is 131123220233. The reversal of 131123220231 is 132022321131.

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

It is not a de Polignac number, because 131123220231 - 2¹⁰ = 131123219207 is a prime.

It is a super-2 number, since 2×131123220231² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131123220198 and 131123220207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131123220233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12461296 + ... + 12471813.

It is an arithmetic number, because the mean of its divisors is an integer number (21866337470).

Almost surely, 2^131123220231 is an apocalyptic number.

131123220231 is a deficient number, since it is larger than the sum of its proper divisors (43807479529).

131123220231 is a wasteful number, since it uses less digits than its factorization.

131123220231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24934865.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 131123220231 its reverse (132022321131), we get a palindrome (263145541362).

The spelling of 131123220231 in words is "one hundred thirty-one billion, one hundred twenty-three million, two hundred twenty thousand, two hundred thirty-one".