21359122 has 12 divisors (see below), whose sum is σ = 32330970. Its totient is φ = 10582976.

The previous prime is 21359119. The next prime is 21359141. The reversal of 21359122 is 22195312.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 16654561 + 4704561 = 4081^2 + 2169^2 .

It is a super-2 number, since 2×21359122² = 912424185221768, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 37254 + ... + 37822.

Almost surely, 2^21359122 is an apocalyptic number.

21359122 is a deficient number, since it is larger than the sum of its proper divisors (10971848).

21359122 is an equidigital number, since it uses as much as digits as its factorization.

21359122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 845 (or 708 counting only the distinct ones).

The product of its digits is 1080, while the sum is 25.

The square root of 21359122 is about 4621.5930154006. The cubic root of 21359122 is about 277.4562201313.

The spelling of 21359122 in words is "twenty-one million, three hundred fifty-nine thousand, one hundred twenty-two".