21100200221222 has 8 divisors (see below), whose sum is σ = 31650326886000. Its totient is φ = 10550091259224.

The previous prime is 21100200221201. The next prime is 21100200221279. The reversal of 21100200221222 is 22212200200112.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 21100200221222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 876722 + ... + 6555077.

It is an arithmetic number, because the mean of its divisors is an integer number (3956290860750).

Almost surely, 2^{21100200221222} is an apocalyptic number.

21100200221222 is a deficient number, since it is larger than the sum of its proper divisors (10550126664778).

21100200221222 is a wasteful number, since it uses less digits than its factorization.

21100200221222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8851390.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 21100200221222 its reverse (22212200200112), we get a palindrome (43312400421334).

The spelling of 21100200221222 in words is "twenty-one trillion, one hundred billion, two hundred million, two hundred twenty-one thousand, two hundred twenty-two".