21120240040004 has 12 divisors (see below), whose sum is σ = 42240480080064. Its totient is φ = 9051531445704.

The previous prime is 21120240039991. The next prime is 21120240040057. The reversal of 21120240040004 is 40004004202112.

21120240040004 is an admirable number.

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, 377147143544 + ... + 377147143599.

It is an arithmetic number, because the mean of its divisors is an integer number (3520040006672).

Almost surely, 2^{21120240040004} is an apocalyptic number.

It is an amenable number.

21120240040004 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21120240040004 is a wasteful number, since it uses less digits than its factorization.

21120240040004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 754294287154 (or 754294287152 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 21120240040004 its reverse (40004004202112), we get a palindrome (61124244242116).

The spelling of 21120240040004 in words is "twenty-one trillion, one hundred twenty billion, two hundred forty million, forty thousand, four".