243102311421 has 16 divisors (see below), whose sum is σ = 325559999808. Its totient is φ = 161357328000.

The previous prime is 243102311411. The next prime is 243102311449. The reversal of 243102311421 is 124113201342.

It is a de Polignac number, because none of the positive numbers 2^k-243102311421 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 243102311391 and 243102311400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243102311401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 959521 + ... + 1186121.

It is an arithmetic number, because the mean of its divisors is an integer number (20347499988).

Almost surely, 2^243102311421 is an apocalyptic number.

It is an amenable number.

243102311421 is a deficient number, since it is larger than the sum of its proper divisors (82457688387).

243102311421 is a wasteful number, since it uses less digits than its factorization.

243102311421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228172.

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 243102311421 its reverse (124113201342), we get a palindrome (367215512763).

The spelling of 243102311421 in words is "two hundred forty-three billion, one hundred two million, three hundred eleven thousand, four hundred twenty-one".