21210220112110 has 16 divisors (see below), whose sum is σ = 38179442012400. Its totient is φ = 8483855642496.

The previous prime is 21210220112089. The next prime is 21210220112129. The reversal of 21210220112110 is 1121102201212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28666740 + ... + 29397319.

It is an arithmetic number, because the mean of its divisors is an integer number (2386215125775).

Almost surely, 2^{21210220112110} is an apocalyptic number.

21210220112110 is a deficient number, since it is larger than the sum of its proper divisors (16969221900290).

21210220112110 is a wasteful number, since it uses less digits than its factorization.

21210220112110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58100595.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21210220112110 its reverse (1121102201212), we get a palindrome (22331322313322).

The spelling of 21210220112110 in words is "twenty-one trillion, two hundred ten billion, two hundred twenty million, one hundred twelve thousand, one hundred ten".