21111220200010 has 8 divisors (see below), whose sum is σ = 38000196360036. Its totient is φ = 8444488080000.

The previous prime is 21111220199999. The next prime is 21111220200011. The reversal of 21111220200010 is 1000202211112.

It can be written as a sum of positive squares in 2 ways, for example, as 21087465067881 + 23755132129 = 4592109^2 + 154127^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (21111220200011) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1055561009991 + ... + 1055561010010.

Almost surely, 2^{21111220200010} is an apocalyptic number.

21111220200010 is a deficient number, since it is larger than the sum of its proper divisors (16888976160026).

21111220200010 is a wasteful number, since it uses less digits than its factorization.

21111220200010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2111122020008.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21111220200010 its reverse (1000202211112), we get a palindrome (22111422411122).

The spelling of 21111220200010 in words is "twenty-one trillion, one hundred eleven billion, two hundred twenty million, two hundred thousand, ten".