21111213030000 has 200 divisors, whose sum is σ = 69304897833600. Its totient is φ = 5534238432000.

The previous prime is 21111213029989. The next prime is 21111213030067. The reversal of 21111213030000 is 3031211112.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (200).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 4193620 + ... + 7733619.

It is an arithmetic number, because the mean of its divisors is an integer number (346524489168).

Almost surely, 2^{21111213030000} is an apocalyptic number.

21111213030000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21111213030000 is an abundant number, since it is smaller than the sum of its proper divisors (48193684803600).

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

21111213030000 is a wasteful number, since it uses less digits than its factorization.

21111213030000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11927329 (or 11927308 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 21111213030000 its reverse (3031211112), we get a palindrome (21114244241112).

The spelling of 21111213030000 in words is "twenty-one trillion, one hundred eleven billion, two hundred thirteen million, thirty thousand".