21010002222122 has 16 divisors (see below), whose sum is σ = 33546425788800. Its totient is φ = 9840284894880.

The previous prime is 21010002222107. The next prime is 21010002222191. The reversal of 21010002222122 is 22122220001012.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 21010002222122.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3106147154 + ... + 3106153917.

It is an arithmetic number, because the mean of its divisors is an integer number (2096651611800).

Almost surely, 2^{21010002222122} is an apocalyptic number.

21010002222122 is a deficient number, since it is larger than the sum of its proper divisors (12536423566678).

21010002222122 is a wasteful number, since it uses less digits than its factorization.

21010002222122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6212301181.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 21010002222122 its reverse (22122220001012), we get a palindrome (43132222223134).

The spelling of 21010002222122 in words is "twenty-one trillion, ten billion, two million, two hundred twenty-two thousand, one hundred twenty-two".