21210001010122 has 24 divisors (see below), whose sum is σ = 33671136823200. Its totient is φ = 10018856827368.

The previous prime is 21210001010117. The next prime is 21210001010123. The reversal of 21210001010122 is 22101010001212.

It is not an unprimeable number, because it can be changed into a prime (21210001010123) 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 11 ways as a sum of consecutive naturals, for example, 40655472 + ... + 41173867.

It is an arithmetic number, because the mean of its divisors is an integer number (1402964034300).

Almost surely, 2^{21210001010122} is an apocalyptic number.

21210001010122 is a deficient number, since it is larger than the sum of its proper divisors (12461135813078).

21210001010122 is a wasteful number, since it uses less digits than its factorization.

21210001010122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81829738 (or 81829719 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21210001010122 its reverse (22101010001212), we get a palindrome (43311011011334).

The spelling of 21210001010122 in words is "twenty-one trillion, two hundred ten billion, one million, ten thousand, one hundred twenty-two".