21133022 has 4 divisors (see below), whose sum is σ = 31699536. Its totient is φ = 10566510.

The previous prime is 21133009. The next prime is 21133027. The reversal of 21133022 is 22033112.

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 = 21132988 and 21133006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21133027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5283254 + ... + 5283257.

It is an arithmetic number, because the mean of its divisors is an integer number (7924884).

Almost surely, 2^21133022 is an apocalyptic number.

21133022 is a deficient number, since it is larger than the sum of its proper divisors (10566514).

21133022 is a wasteful number, since it uses less digits than its factorization.

21133022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10566513.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 21133022 is about 4597.0666734343. The cubic root of 21133022 is about 276.4737278387.

Adding to 21133022 its reverse (22033112), we get a palindrome (43166134).

It can be divided in two parts, 211 and 33022, that added together give a palindrome (33233).

The spelling of 21133022 in words is "twenty-one million, one hundred thirty-three thousand, twenty-two".