21022112220100 has 36 divisors (see below), whose sum is σ = 46678866864784. Its totient is φ = 8213290354080.

The previous prime is 21022112220077. The next prime is 21022112220127. The reversal of 21022112220100 is 102221122012.

It is a happy 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 11 ways as a sum of consecutive naturals, for example, 2444427354 + ... + 2444435953.

Almost surely, 2^{21022112220100} is an apocalyptic number.

21022112220100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21022112220100 is an abundant number, since it is smaller than the sum of its proper divisors (25656754644684).

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

21022112220100 is a wasteful number, since it uses less digits than its factorization.

21022112220100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4888863364 (or 4888863357 counting only the distinct ones).

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

Adding to 21022112220100 its reverse (102221122012), we get a palindrome (21124333342112).

The spelling of 21022112220100 in words is "twenty-one trillion, twenty-two billion, one hundred twelve million, two hundred twenty thousand, one hundred".