21100200222122 has 64 divisors (see below), whose sum is σ = 36916408488960. Its totient is φ = 8859214377216.

The previous prime is 21100200222109. The next prime is 21100200222133. The reversal of 21100200222122 is 22122200200112.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 21100200222122.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 49705493 + ... + 50128199.

It is an arithmetic number, because the mean of its divisors is an integer number (576818882640).

Almost surely, 2^{21100200222122} is an apocalyptic number.

21100200222122 is a deficient number, since it is larger than the sum of its proper divisors (15816208266838).

21100200222122 is a wasteful number, since it uses less digits than its factorization.

21100200222122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423195.

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

Adding to 21100200222122 its reverse (22122200200112), we get a palindrome (43222400422234).

The spelling of 21100200222122 in words is "twenty-one trillion, one hundred billion, two hundred million, two hundred twenty-two thousand, one hundred twenty-two".