243121213702 has 16 divisors (see below), whose sum is σ = 375667261200. Its totient is φ = 117936739872.

The previous prime is 243121213693. The next prime is 243121213703. The reversal of 243121213702 is 207312121342.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243121213703) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 9473733 + ... + 9499360.

It is an arithmetic number, because the mean of its divisors is an integer number (23479203825).

Almost surely, 2^243121213702 is an apocalyptic number.

243121213702 is a deficient number, since it is larger than the sum of its proper divisors (132546047498).

243121213702 is a wasteful number, since it uses less digits than its factorization.

243121213702 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18973287.

The product of its (nonzero) digits is 4032, while the sum is 28.

The spelling of 243121213702 in words is "two hundred forty-three billion, one hundred twenty-one million, two hundred thirteen thousand, seven hundred two".