21120000242 has 8 divisors (see below), whose sum is σ = 34560000432. Its totient is φ = 9600000100.

The previous prime is 21120000227. The next prime is 21120000287. The reversal of 21120000242 is 24200002112.

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, 479999984 + ... + 480000027.

It is an arithmetic number, because the mean of its divisors is an integer number (4320000054).

Almost surely, 2^21120000242 is an apocalyptic number.

21120000242 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21120000242 is a deficient number, since it is larger than the sum of its proper divisors (13440000190).

21120000242 is a wasteful number, since it uses less digits than its factorization.

21120000242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 960000024.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 21120000242 its reverse (24200002112), we get a palindrome (45320002354).

The spelling of 21120000242 in words is "twenty-one billion, one hundred twenty million, two hundred forty-two", and thus it is an aban number.