131123201 has 4 divisors (see below), whose sum is σ = 143043504. Its totient is φ = 119202900.

The previous prime is 131123183. The next prime is 131123203. The reversal of 131123201 is 102321131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 131123201 - 2¹⁸ = 130861057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131123203) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5960135 + ... + 5960156.

It is an arithmetic number, because the mean of its divisors is an integer number (35760876).

Almost surely, 2^131123201 is an apocalyptic number.

131123201 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

131123201 is a deficient number, since it is larger than the sum of its proper divisors (11920303).

131123201 is a wasteful number, since it uses less digits than its factorization.

131123201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11920302.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 131123201 is about 11450.9039381177. The cubic root of 131123201 is about 508.0344710215.

Adding to 131123201 its reverse (102321131), we get a palindrome (233444332).

The spelling of 131123201 in words is "one hundred thirty-one million, one hundred twenty-three thousand, two hundred one".