21012200011222 has 16 divisors (see below), whose sum is σ = 38139791617440. Its totient is φ = 8475509248128.

The previous prime is 21012200011189. The next prime is 21012200011261. The reversal of 21012200011222 is 22211000221012.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21012200011196 and 21012200011205.

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, 44143277097 + ... + 44143277572.

It is an arithmetic number, because the mean of its divisors is an integer number (2383736976090).

Almost surely, 2^{21012200011222} is an apocalyptic number.

21012200011222 is a deficient number, since it is larger than the sum of its proper divisors (17127591606218).

21012200011222 is a wasteful number, since it uses less digits than its factorization.

21012200011222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88286554695.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21012200011222 its reverse (22211000221012), we get a palindrome (43223200232234).

The spelling of 21012200011222 in words is "twenty-one trillion, twelve billion, two hundred million, eleven thousand, two hundred twenty-two".