131224423121 has 32 divisors (see below), whose sum is σ = 153092560896. Its totient is φ = 111158784000.

The previous prime is 131224423091. The next prime is 131224423133. The reversal of 131224423121 is 121324422131.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-131224423121 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131224423021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7788176 + ... + 7805006.

It is an arithmetic number, because the mean of its divisors is an integer number (4784142528).

Almost surely, 2^131224423121 is an apocalyptic number.

131224423121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

131224423121 is a deficient number, since it is larger than the sum of its proper divisors (21868137775).

131224423121 is a wasteful number, since it uses less digits than its factorization.

131224423121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17273.

The product of its digits is 2304, while the sum is 26.

Adding to 131224423121 its reverse (121324422131), we get a palindrome (252548845252).

The spelling of 131224423121 in words is "one hundred thirty-one billion, two hundred twenty-four million, four hundred twenty-three thousand, one hundred twenty-one".