21100221022 has 16 divisors (see below), whose sum is σ = 33038917632. Its totient is φ = 10087595320.

The previous prime is 21100221019. The next prime is 21100221047. The reversal of 21100221022 is 22012200112.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21100220993 and 21100221011.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38247 + ... + 208957.

It is an arithmetic number, because the mean of its divisors is an integer number (2064932352).

Almost surely, 2^21100221022 is an apocalyptic number.

21100221022 is a deficient number, since it is larger than the sum of its proper divisors (11938696610).

21100221022 is a wasteful number, since it uses less digits than its factorization.

21100221022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173423.

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

Adding to 21100221022 its reverse (22012200112), we get a palindrome (43112421134).

The spelling of 21100221022 in words is "twenty-one billion, one hundred million, two hundred twenty-one thousand, twenty-two".