243121242120 has 32 divisors (see below), whose sum is σ = 729363726720. Its totient is φ = 64832331200.

The previous prime is 243121242073. The next prime is 243121242157. The reversal of 243121242120 is 21242121342.

It is a Harshad number since it is a multiple of its sum of digits (24).

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, 1013005056 + ... + 1013005295.

It is an arithmetic number, because the mean of its divisors is an integer number (22792616460).

Almost surely, 2^243121242120 is an apocalyptic number.

243121242120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243121242120 is an abundant number, since it is smaller than the sum of its proper divisors (486242484600).

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

243121242120 is a wasteful number, since it uses less digits than its factorization.

243121242120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2026010365 (or 2026010361 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 243121242120 its reverse (21242121342), we get a palindrome (264363363462).

The spelling of 243121242120 in words is "two hundred forty-three billion, one hundred twenty-one million, two hundred forty-two thousand, one hundred twenty".