21120404222 has 32 divisors (see below), whose sum is σ = 33505726464. Its totient is φ = 9971539200.

The previous prime is 21120404209. The next prime is 21120404233. The reversal of 21120404222 is 22240402112.

It is a junction number, because it is equal to n+sod(n) for n = 21120404194 and 21120404203.

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, 402263 + ... + 451725.

It is an arithmetic number, because the mean of its divisors is an integer number (1047053952).

Almost surely, 2^21120404222 is an apocalyptic number.

21120404222 is a deficient number, since it is larger than the sum of its proper divisors (12385322242).

21120404222 is a wasteful number, since it uses less digits than its factorization.

21120404222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49664.

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 21120404222 its reverse (22240402112), we get a palindrome (43360806334).

The spelling of 21120404222 in words is "twenty-one billion, one hundred twenty million, four hundred four thousand, two hundred twenty-two".