21222222121010 has 16 divisors (see below), whose sum is σ = 38251413020736. Its totient is φ = 8477463692208.

The previous prime is 21222222120949. The next prime is 21222222121021. The reversal of 21222222121010 is 1012122222212.

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, 1428136724 + ... + 1428151583.

It is an arithmetic number, because the mean of its divisors is an integer number (2390713313796).

Almost surely, 2^{21222222121010} is an apocalyptic number.

21222222121010 is a deficient number, since it is larger than the sum of its proper divisors (17029190899726).

21222222121010 is a wasteful number, since it uses less digits than its factorization.

21222222121010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2856289057.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 21222222121010 its reverse (1012122222212), we get a palindrome (22234344343222).

The spelling of 21222222121010 in words is "twenty-one trillion, two hundred twenty-two billion, two hundred twenty-two million, one hundred twenty-one thousand, ten".