243121244020 has 24 divisors (see below), whose sum is σ = 510601744800. Its totient is φ = 97239520032.

The previous prime is 243121243997. The next prime is 243121244071. The reversal of 243121244020 is 20442121342.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 336850 + ... + 774409.

It is an arithmetic number, because the mean of its divisors is an integer number (21275072700).

Almost surely, 2^243121244020 is an apocalyptic number.

243121244020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243121244020 is an abundant number, since it is smaller than the sum of its proper divisors (267480500780).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

243121244020 is a wasteful number, since it uses less digits than its factorization.

243121244020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1122207 (or 1122205 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 243121244020 its reverse (20442121342), we get a palindrome (263563365362).

The spelling of 243121244020 in words is "two hundred forty-three billion, one hundred twenty-one million, two hundred forty-four thousand, twenty".