21122212211210 has 64 divisors (see below), whose sum is σ = 42473099243520. Its totient is φ = 7496491087680.

The previous prime is 21122212211201. The next prime is 21122212211213. The reversal of 21122212211210 is 1211221222112.

It is a super-2 number, since 2×21122212211210² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21122212211213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4546079 + ... + 7931661.

It is an arithmetic number, because the mean of its divisors is an integer number (663642175680).

Almost surely, 2^{21122212211210} is an apocalyptic number.

21122212211210 is an abundant number, since it is smaller than the sum of its proper divisors (21350887032310).

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

21122212211210 is a wasteful number, since it uses less digits than its factorization.

21122212211210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3386963.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 21122212211210 its reverse (1211221222112), we get a palindrome (22333433433322).

The spelling of 21122212211210 in words is "twenty-one trillion, one hundred twenty-two billion, two hundred twelve million, two hundred eleven thousand, two hundred ten".