21101101022 has 4 divisors (see below), whose sum is σ = 31651651536.
Its totient is φ = 10550550510.
The previous prime is 21101101009. The next prime is 21101101027. The reversal of 21101101022 is 22010110112.
Adding to 21101101022 its reverse (22010110112), we get a palindrome (43111211134).
It is a semiprime because it is the product of two primes.
It is a junction number, because it is equal to n+sod(n) for n = 21101100994 and 21101101012.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (21101101027) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (23) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5275275254 + ... + 5275275257.
It is an arithmetic number, because the mean of its divisors is an integer number (7912912884).
Almost surely, 221101101022 is an apocalyptic number.
21101101022 is a deficient number, since it is larger than the sum of its proper divisors (10550550514).
21101101022 is a wasteful number, since it uses less digits than its factorization.
21101101022 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 10550550513.
The product of its (nonzero) digits is 8, while the sum is 11.
The spelling of 21101101022 in words is "twenty-one billion, one hundred one million, one hundred one thousand, twenty-two".