21155350230112 has 24 divisors (see below), whose sum is σ = 47599538018256. Its totient is φ = 9066578669952.

The previous prime is 21155350230097. The next prime is 21155350230151. The reversal of 21155350230112 is 21103205355112.

It is a happy number.

It is a congruent 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, 47221763683 + ... + 47221764130.

It is an arithmetic number, because the mean of its divisors is an integer number (1983314084094).

Almost surely, 2^{21155350230112} is an apocalyptic number.

It is an amenable number.

21155350230112 is an abundant number, since it is smaller than the sum of its proper divisors (26444187788144).

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

21155350230112 is an equidigital number, since it uses as much as digits as its factorization.

21155350230112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94443527830 (or 94443527822 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 31.

Adding to 21155350230112 its reverse (21103205355112), we get a palindrome (42258555585224).

The spelling of 21155350230112 in words is "twenty-one trillion, one hundred fifty-five billion, three hundred fifty million, two hundred thirty thousand, one hundred twelve".