21103022 has 4 divisors (see below), whose sum is σ = 31654536. Its totient is φ = 10551510.

The previous prime is 21103021. The next prime is 21103051. The reversal of 21103022 is 22030112.

It is a happy number.

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 = 21102994 and 21103012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21103021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5275754 + ... + 5275757.

It is an arithmetic number, because the mean of its divisors is an integer number (7913634).

Almost surely, 2^21103022 is an apocalyptic number.

21103022 is a deficient number, since it is larger than the sum of its proper divisors (10551514).

21103022 is a wasteful number, since it uses less digits than its factorization.

21103022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10551513.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 21103022 is about 4593.8025643251. The cubic root of 21103022 is about 276.3428404263.

Adding to 21103022 its reverse (22030112), we get a palindrome (43133134).

The spelling of 21103022 in words is "twenty-one million, one hundred three thousand, twenty-two".