21001122022210 has 32 divisors (see below), whose sum is σ = 41646869544384. Its totient is φ = 7561160040000.

The previous prime is 21001122022163. The next prime is 21001122022247. The reversal of 21001122022210 is 1222022110012.

It is a happy number.

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 15 ways as a sum of consecutive naturals, for example, 945133896 + ... + 945156115.

It is an arithmetic number, because the mean of its divisors is an integer number (1301464673262).

Almost surely, 2^{21001122022210} is an apocalyptic number.

21001122022210 is a deficient number, since it is larger than the sum of its proper divisors (20645747522174).

21001122022210 is a wasteful number, since it uses less digits than its factorization.

21001122022210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1890290130.

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

Adding to 21001122022210 its reverse (1222022110012), we get a palindrome (22223144132222).

The spelling of 21001122022210 in words is "twenty-one trillion, one billion, one hundred twenty-two million, twenty-two thousand, two hundred ten".