21000120102110 has 32 divisors (see below), whose sum is σ = 38400996551040. Its totient is φ = 8267220718848.

The previous prime is 21000120102097. The next prime is 21000120102179. The reversal of 21000120102110 is 1120102100012.

It is a junction number, because it is equal to n+sod(n) for n = 21000120102091 and 21000120102100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42216677 + ... + 42711216.

It is an arithmetic number, because the mean of its divisors is an integer number (1200031142220).

Almost surely, 2^{21000120102110} is an apocalyptic number.

21000120102110 is a deficient number, since it is larger than the sum of its proper divisors (17400876448930).

21000120102110 is a wasteful number, since it uses less digits than its factorization.

21000120102110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84928292.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 21000120102110 its reverse (1120102100012), we get a palindrome (22120222202122).

The spelling of 21000120102110 in words is "twenty-one trillion, one hundred twenty million, one hundred two thousand, one hundred ten".