21130122 has 16 divisors (see below), whose sum is σ = 45511200. Its totient is φ = 6501552.

The previous prime is 21130111. The next prime is 21130231. The reversal of 21130122 is 22103112.

It is a junction number, because it is equal to n+sod(n) for n = 21130098 and 21130107.

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 7 ways as a sum of consecutive naturals, for example, 135372 + ... + 135527.

It is an arithmetic number, because the mean of its divisors is an integer number (2844450).

Almost surely, 2^21130122 is an apocalyptic number.

21130122 is an abundant number, since it is smaller than the sum of its proper divisors (24381078).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21130122 is a wasteful number, since it uses less digits than its factorization.

21130122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270917.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 21130122 is about 4596.7512440853. The cubic root of 21130122 is about 276.4610807993.

Adding to 21130122 its reverse (22103112), we get a palindrome (43233234).

The spelling of 21130122 in words is "twenty-one million, one hundred thirty thousand, one hundred twenty-two".