21012200222 has 64 divisors (see below), whose sum is σ = 35126784000. Its totient is φ = 9367263360.

The previous prime is 21012200219. The next prime is 21012200267. The reversal of 21012200222 is 22200221012.

It is a junction number, because it is equal to n+sod(n) for n = 21012200197 and 21012200206.

It is a congruent 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 31 ways as a sum of consecutive naturals, for example, 21728783 + ... + 21729749.

It is an arithmetic number, because the mean of its divisors is an integer number (548856000).

Almost surely, 2^21012200222 is an apocalyptic number.

21012200222 is a deficient number, since it is larger than the sum of its proper divisors (14114583778).

21012200222 is a wasteful number, since it uses less digits than its factorization.

21012200222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1281.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 21012200222 its reverse (22200221012), we get a palindrome (43212421234).

The spelling of 21012200222 in words is "twenty-one billion, twelve million, two hundred thousand, two hundred twenty-two".