21120310222 has 16 divisors (see below), whose sum is σ = 34703920944. Its totient is φ = 9560304000.

The previous prime is 21120310219. The next prime is 21120310223. The reversal of 21120310222 is 22201302112.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21120310196 and 21120310205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21120310223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1986429 + ... + 1997032.

It is an arithmetic number, because the mean of its divisors is an integer number (2168995059).

Almost surely, 2^21120310222 is an apocalyptic number.

21120310222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21120310222 is a deficient number, since it is larger than the sum of its proper divisors (13583610722).

21120310222 is a wasteful number, since it uses less digits than its factorization.

21120310222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3983715.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 21120310222 its reverse (22201302112), we get a palindrome (43321612334).

The spelling of 21120310222 in words is "twenty-one billion, one hundred twenty million, three hundred ten thousand, two hundred twenty-two".