21120222012222 has 32 divisors (see below), whose sum is σ = 42311386368000. Its totient is φ = 7028251024608.

The previous prime is 21120222012209. The next prime is 21120222012251. The reversal of 21120222012222 is 22221022202112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 144875104 + ... + 145020812.

It is an arithmetic number, because the mean of its divisors is an integer number (1322230824000).

Almost surely, 2^{21120222012222} is an apocalyptic number.

21120222012222 is an abundant number, since it is smaller than the sum of its proper divisors (21191164355778).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21120222012222 is a wasteful number, since it uses less digits than its factorization.

21120222012222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186120.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 21120222012222 its reverse (22221022202112), we get a palindrome (43341244214334).

The spelling of 21120222012222 in words is "twenty-one trillion, one hundred twenty billion, two hundred twenty-two million, twelve thousand, two hundred twenty-two".