21012210211222 has 16 divisors (see below), whose sum is σ = 33376616633232. Its totient is φ = 9886829954560.

The previous prime is 21012210211217. The next prime is 21012210211231. The reversal of 21012210211222 is 22211201221012.

It is a self number, because there is not a number n which added to its sum of digits gives 21012210211222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39386404 + ... + 39916327.

It is an arithmetic number, because the mean of its divisors is an integer number (2086038539577).

Almost surely, 2^{21012210211222} is an apocalyptic number.

21012210211222 is a deficient number, since it is larger than the sum of its proper divisors (12364406422010).

21012210211222 is a wasteful number, since it uses less digits than its factorization.

21012210211222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79310543.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 21012210211222 its reverse (22211201221012), we get a palindrome (43223411432234).

The spelling of 21012210211222 in words is "twenty-one trillion, twelve billion, two hundred ten million, two hundred eleven thousand, two hundred twenty-two".