21201110110122 has 64 divisors (see below), whose sum is σ = 44694241637760. Its totient is φ = 6694266924800.

The previous prime is 21201110110121. The next prime is 21201110110207. The reversal of 21201110110122 is 22101101110212.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21201110110121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 235494097 + ... + 235584107.

It is an arithmetic number, because the mean of its divisors is an integer number (698347525590).

Almost surely, 2^{21201110110122} is an apocalyptic number.

21201110110122 is an abundant number, since it is smaller than the sum of its proper divisors (23493131527638).

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

21201110110122 is a wasteful number, since it uses less digits than its factorization.

21201110110122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115639.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 21201110110122 its reverse (22101101110212), we get a palindrome (43302211220334).

The spelling of 21201110110122 in words is "twenty-one trillion, two hundred one billion, one hundred ten million, one hundred ten thousand, one hundred twenty-two".