243120523321131 has 16 divisors (see below), whose sum is σ = 334055481758208. Its totient is φ = 157180300347200.

The previous prime is 243120523321087. The next prime is 243120523321139. The reversal of 243120523321131 is 131123325021342.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 243120523321131 - 2¹³ = 243120523312939 is a prime.

It is a super-2 number, since 2×243120523321131² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 243120523321092 and 243120523321101.

It is not an unprimeable number, because it can be changed into a prime (243120523321139) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5917912455 + ... + 5917953536.

It is an arithmetic number, because the mean of its divisors is an integer number (20878467609888).

Almost surely, 2^{243120523321131} is an apocalyptic number.

243120523321131 is a deficient number, since it is larger than the sum of its proper divisors (90934958437077).

243120523321131 is a wasteful number, since it uses less digits than its factorization.

243120523321131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11835866202.

The product of its (nonzero) digits is 25920, while the sum is 33.

Adding to 243120523321131 its reverse (131123325021342), we get a palindrome (374243848342473).

The spelling of 243120523321131 in words is "two hundred forty-three trillion, one hundred twenty billion, five hundred twenty-three million, three hundred twenty-one thousand, one hundred thirty-one".