21331102 has 8 divisors (see below), whose sum is σ = 34457976. Its totient is φ = 9845112.

The previous prime is 21331081. The next prime is 21331103. The reversal of 21331102 is 20113312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21331103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 410188 + ... + 410239.

It is an arithmetic number, because the mean of its divisors is an integer number (4307247).

Almost surely, 2^21331102 is an apocalyptic number.

21331102 is a deficient number, since it is larger than the sum of its proper divisors (13126874).

21331102 is a wasteful number, since it uses less digits than its factorization.

21331102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 820442.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 21331102 is about 4618.5605982817. The cubic root of 21331102 is about 277.3348399023.

Adding to 21331102 its reverse (20113312), we get a palindrome (41444414).

The spelling of 21331102 in words is "twenty-one million, three hundred thirty-one thousand, one hundred two".