21100000021222 has 16 divisors (see below), whose sum is σ = 31665992709600. Its totient is φ = 10544670423040.

The previous prime is 21100000021189. The next prime is 21100000021253. The reversal of 21100000021222 is 22212000000112.

It is a happy number.

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 7 ways as a sum of consecutive naturals, for example, 32428572 + ... + 33072832.

It is an arithmetic number, because the mean of its divisors is an integer number (1979124544350).

Almost surely, 2^{21100000021222} is an apocalyptic number.

21100000021222 is a deficient number, since it is larger than the sum of its proper divisors (10565992688378).

21100000021222 is a wasteful number, since it uses less digits than its factorization.

21100000021222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 652511.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 21100000021222 its reverse (22212000000112), we get a palindrome (43312000021334).

The spelling of 21100000021222 in words is "twenty-one trillion, one hundred billion, twenty-one thousand, two hundred twenty-two".