21050222 has 16 divisors (see below), whose sum is σ = 32635872. Its totient is φ = 10177440.

The previous prime is 21050203. The next prime is 21050231. The reversal of 21050222 is 22205012.

It is a super-2 number, since 2×21050222² = 886223692498568, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21050197 and 21050206.

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, 6128 + ... + 8924.

It is an arithmetic number, because the mean of its divisors is an integer number (2039742).

Almost surely, 2^21050222 is an apocalyptic number.

21050222 is a deficient number, since it is larger than the sum of its proper divisors (11585650).

21050222 is a wasteful number, since it uses less digits than its factorization.

21050222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2923.

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 21050222 is about 4588.0520921193. The cubic root of 21050222 is about 276.1121769731.

Adding to 21050222 its reverse (22205012), we get a palindrome (43255234).

The spelling of 21050222 in words is "twenty-one million, fifty thousand, two hundred twenty-two".