21100100221122 has 16 divisors (see below), whose sum is σ = 45446369707200. Its totient is φ = 6492338529552.

The previous prime is 21100100221121. The next prime is 21100100221219. The reversal of 21100100221122 is 22112200100112.

It is not an unprimeable number, because it can be changed into a prime (21100100221121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 135257052622 + ... + 135257052777.

It is an arithmetic number, because the mean of its divisors is an integer number (2840398106700).

Almost surely, 2^{21100100221122} is an apocalyptic number.

21100100221122 is an abundant number, since it is smaller than the sum of its proper divisors (24346269486078).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21100100221122 is a wasteful number, since it uses less digits than its factorization.

21100100221122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270514105417.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21100100221122 its reverse (22112200100112), we get a palindrome (43212300321234).

The spelling of 21100100221122 in words is "twenty-one trillion, one hundred billion, one hundred million, two hundred twenty-one thousand, one hundred twenty-two".