243121544402 has 36 divisors (see below), whose sum is σ = 423057019518. Its totient is φ = 104693450400.

The previous prime is 243121544357. The next prime is 243121544431. The reversal of 243121544402 is 204445121342.

243121544402 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 243079566961 + 41977441 = 493031^2 + 6479^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1304099 + ... + 1478822.

Almost surely, 2^243121544402 is an apocalyptic number.

243121544402 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

243121544402 is a deficient number, since it is larger than the sum of its proper divisors (179935475116).

243121544402 is a wasteful number, since it uses less digits than its factorization.

243121544402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2782983 (or 2782953 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 32.

Adding to 243121544402 its reverse (204445121342), we get a palindrome (447566665744).

The spelling of 243121544402 in words is "two hundred forty-three billion, one hundred twenty-one million, five hundred forty-four thousand, four hundred two".