131123022121 has 16 divisors (see below), whose sum is σ = 162218379904. Its totient is φ = 103208131584.

The previous prime is 131123022083. The next prime is 131123022127. The reversal of 131123022121 is 121220321131.

It is a cyclic number.

It is not a de Polignac number, because 131123022121 - 2¹⁵ = 131122989353 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131123022127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3715371 + ... + 3750496.

It is an arithmetic number, because the mean of its divisors is an integer number (10138648744).

Almost surely, 2^131123022121 is an apocalyptic number.

It is an amenable number.

131123022121 is a deficient number, since it is larger than the sum of its proper divisors (31095357783).

131123022121 is a wasteful number, since it uses less digits than its factorization.

131123022121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7466080.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 131123022121 its reverse (121220321131), we get a palindrome (252343343252).

The spelling of 131123022121 in words is "one hundred thirty-one billion, one hundred twenty-three million, twenty-two thousand, one hundred twenty-one".