21010002221122 has 16 divisors (see below), whose sum is σ = 31644043528320. Its totient is φ = 10462029214032.

The previous prime is 21010002221057. The next prime is 21010002221147. The reversal of 21010002221122 is 22112220001012.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21010002221096 and 21010002221105.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 9361978 + ... + 11387125.

It is an arithmetic number, because the mean of its divisors is an integer number (1977752720520).

Almost surely, 2^{21010002221122} is an apocalyptic number.

21010002221122 is a deficient number, since it is larger than the sum of its proper divisors (10634041307198).

21010002221122 is a wasteful number, since it uses less digits than its factorization.

21010002221122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20751177.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21010002221122 its reverse (22112220001012), we get a palindrome (43122222222134).

The spelling of 21010002221122 in words is "twenty-one trillion, ten billion, two million, two hundred twenty-one thousand, one hundred twenty-two".