21120122 has 8 divisors (see below), whose sum is σ = 31704276. Its totient is φ = 10552032.

The previous prime is 21120119. The next prime is 21120131. The reversal of 21120122 is 22102112.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 20967241 + 152881 = 4579^2 + 391^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 128 + ... + 6500.

Almost surely, 2^21120122 is an apocalyptic number.

21120122 is a deficient number, since it is larger than the sum of its proper divisors (10584154).

21120122 is a wasteful number, since it uses less digits than its factorization.

21120122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8032.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 21120122 is about 4595.6633906325. The cubic root of 21120122 is about 276.4174614416.

Adding to 21120122 its reverse (22102112), we get a palindrome (43222234).

The spelling of 21120122 in words is "twenty-one million, one hundred twenty thousand, one hundred twenty-two".