243121131142 has 32 divisors (see below), whose sum is σ = 384686501760. Its totient is φ = 115122047040.

The previous prime is 243121131101. The next prime is 243121131181. The reversal of 243121131142 is 241131121342.

243121131142 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

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, 42217 + ... + 698587.

It is an arithmetic number, because the mean of its divisors is an integer number (12021453180).

Almost surely, 2^243121131142 is an apocalyptic number.

243121131142 is a deficient number, since it is larger than the sum of its proper divisors (141565370618).

243121131142 is a wasteful number, since it uses less digits than its factorization.

243121131142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 656548.

The product of its digits is 1152, while the sum is 25.

Adding to 243121131142 its reverse (241131121342), we get a palindrome (484252252484).

The spelling of 243121131142 in words is "two hundred forty-three billion, one hundred twenty-one million, one hundred thirty-one thousand, one hundred forty-two".