21300122 has 4 divisors (see below), whose sum is σ = 31950186. Its totient is φ = 10650060.

The previous prime is 21300119. The next prime is 21300127. The reversal of 21300122 is 22100312.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 19280881 + 2019241 = 4391^2 + 1421^2 .

It is not an unprimeable number, because it can be changed into a prime (21300127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5325029 + ... + 5325032.

Almost surely, 2^21300122 is an apocalyptic number.

21300122 is a deficient number, since it is larger than the sum of its proper divisors (10650064).

21300122 is a wasteful number, since it uses less digits than its factorization.

21300122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10650063.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 21300122 is about 4615.2055208842. The cubic root of 21300122 is about 277.2005134133.

Adding to 21300122 its reverse (22100312), we get a palindrome (43400434).

The spelling of 21300122 in words is "twenty-one million, three hundred thousand, one hundred twenty-two".