21110202022210 has 128 divisors (see below), whose sum is σ = 44591662522368. Its totient is φ = 7046110080000.

The previous prime is 21110202022123. The next prime is 21110202022229. The reversal of 21110202022210 is 1222020201112.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1492618399 + ... + 1492632541.

It is an arithmetic number, because the mean of its divisors is an integer number (348372363456).

Almost surely, 2^{21110202022210} is an apocalyptic number.

21110202022210 is an abundant number, since it is smaller than the sum of its proper divisors (23481460500158).

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

21110202022210 is a wasteful number, since it uses less digits than its factorization.

21110202022210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17780.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21110202022210 its reverse (1222020201112), we get a palindrome (22332222223322).

The spelling of 21110202022210 in words is "twenty-one trillion, one hundred ten billion, two hundred two million, twenty-two thousand, two hundred ten".