21220101110110 has 64 divisors (see below), whose sum is σ = 44727148892160. Its totient is φ = 7096478388480.

The previous prime is 21220101110101. The next prime is 21220101110203. The reversal of 21220101110110 is 1101110102212.

It is a happy number.

It is a super-2 number, since 2×21220101110110² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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, 12517017 + ... + 14110843.

It is an arithmetic number, because the mean of its divisors is an integer number (698861701440).

Almost surely, 2^{21220101110110} is an apocalyptic number.

21220101110110 is an abundant number, since it is smaller than the sum of its proper divisors (23507047782050).

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

21220101110110 is a wasteful number, since it uses less digits than its factorization.

21220101110110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1598521.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 21220101110110 its reverse (1101110102212), we get a palindrome (22321211212322).

The spelling of 21220101110110 in words is "twenty-one trillion, two hundred twenty billion, one hundred one million, one hundred ten thousand, one hundred ten".