243121213402 has 8 divisors (see below), whose sum is σ = 365527950912. Its totient is φ = 121278563100.

The previous prime is 243121213373. The next prime is 243121213499. The reversal of 243121213402 is 204312121342.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 141020724 + ... + 141022447.

It is an arithmetic number, because the mean of its divisors is an integer number (45690993864).

Almost surely, 2^243121213402 is an apocalyptic number.

243121213402 is a deficient number, since it is larger than the sum of its proper divisors (122406737510).

243121213402 is a wasteful number, since it uses less digits than its factorization.

243121213402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282043604.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 243121213402 its reverse (204312121342), we get a palindrome (447433334744).

It can be divided in two parts, 24312121340 and 2, that added together give a palindrome (24312121342).

The spelling of 243121213402 in words is "two hundred forty-three billion, one hundred twenty-one million, two hundred thirteen thousand, four hundred two".