21100111222010 has 8 divisors (see below), whose sum is σ = 37980200199636. Its totient is φ = 8440044488800.

The previous prime is 21100111221989. The next prime is 21100111222063. The reversal of 21100111222010 is 1022211100112.

It can be written as a sum of positive squares in 2 ways, for example, as 20079871837249 + 1020239384761 = 4481057^2 + 1010069^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1055005561091 + ... + 1055005561110.

Almost surely, 2^{21100111222010} is an apocalyptic number.

21100111222010 is a deficient number, since it is larger than the sum of its proper divisors (16880088977626).

21100111222010 is a wasteful number, since it uses less digits than its factorization.

21100111222010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2110011122208.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21100111222010 its reverse (1022211100112), we get a palindrome (22122322322122).

The spelling of 21100111222010 in words is "twenty-one trillion, one hundred billion, one hundred eleven million, two hundred twenty-two thousand, ten".