21244102 has 16 divisors (see below), whose sum is σ = 34855632. Its totient is φ = 9630720.

The previous prime is 21244073. The next prime is 21244121. The reversal of 21244102 is 20144212.

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, 8998 + ... + 11110.

It is an arithmetic number, because the mean of its divisors is an integer number (2178477).

Almost surely, 2^21244102 is an apocalyptic number.

21244102 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21244102 is a deficient number, since it is larger than the sum of its proper divisors (13611530).

21244102 is a wasteful number, since it uses less digits than its factorization.

21244102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2583.

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 21244102 is about 4609.1324563306. The cubic root of 21244102 is about 276.9572846591.

Adding to 21244102 its reverse (20144212), we get a palindrome (41388314).

It can be divided in two parts, 2124 and 4102, that added together give a palindrome (6226).

The spelling of 21244102 in words is "twenty-one million, two hundred forty-four thousand, one hundred two".