243121215141 has 48 divisors (see below), whose sum is σ = 407505346560. Its totient is φ = 136808364960.

The previous prime is 243121215131. The next prime is 243121215193. The reversal of 243121215141 is 141512121342.

243121215141 is a `hidden beast` number, since 2 + 4 + 3 + 121 + 21 + 514 + 1 = 666.

It is not a de Polignac number, because 243121215141 - 2¹⁴ = 243121198757 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243121215131) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1056876 + ... + 1266186.

It is an arithmetic number, because the mean of its divisors is an integer number (8489694720).

Almost surely, 2^243121215141 is an apocalyptic number.

243121215141 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

243121215141 is a deficient number, since it is larger than the sum of its proper divisors (164384131419).

243121215141 is a wasteful number, since it uses less digits than its factorization.

243121215141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209606 (or 209603 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

Adding to 243121215141 its reverse (141512121342), we get a palindrome (384633336483).

The spelling of 243121215141 in words is "two hundred forty-three billion, one hundred twenty-one million, two hundred fifteen thousand, one hundred forty-one".