21112120220210 has 16 divisors (see below), whose sum is σ = 38052962865216. Its totient is φ = 8433482206128.

The previous prime is 21112120220209. The next prime is 21112120220221. The reversal of 21112120220210 is 1202202121112.

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, 1420727444 + ... + 1420742303.

It is an arithmetic number, because the mean of its divisors is an integer number (2378310179076).

Almost surely, 2^{21112120220210} is an apocalyptic number.

21112120220210 is a deficient number, since it is larger than the sum of its proper divisors (16940842645006).

21112120220210 is a wasteful number, since it uses less digits than its factorization.

21112120220210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2841470497.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21112120220210 its reverse (1202202121112), we get a palindrome (22314322341322).

The spelling of 21112120220210 in words is "twenty-one trillion, one hundred twelve billion, one hundred twenty million, two hundred twenty thousand, two hundred ten".