131123221554201 has 4 divisors (see below), whose sum is σ = 174830962072272. Its totient is φ = 87415481036132.

The previous prime is 131123221554187. The next prime is 131123221554211. The reversal of 131123221554201 is 102455122321131.

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 131123221554201 - 2¹⁸ = 131123221292057 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131123221554211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21853870259031 + ... + 21853870259036.

It is an arithmetic number, because the mean of its divisors is an integer number (43707740518068).

Almost surely, 2^{131123221554201} is an apocalyptic number.

It is an amenable number.

131123221554201 is a deficient number, since it is larger than the sum of its proper divisors (43707740518071).

131123221554201 is an equidigital number, since it uses as much as digits as its factorization.

131123221554201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43707740518070.

The product of its (nonzero) digits is 14400, while the sum is 33.

Adding to 131123221554201 its reverse (102455122321131), we get a palindrome (233578343875332).

The spelling of 131123221554201 in words is "one hundred thirty-one trillion, one hundred twenty-three billion, two hundred twenty-one million, five hundred fifty-four thousand, two hundred one".