21024122 has 8 divisors (see below), whose sum is σ = 36041376. Its totient is φ = 9010332.

The previous prime is 21024097. The next prime is 21024137. The reversal of 21024122 is 22142012.

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 (14), and also a Moran number because the ratio is a prime number: 1501723 = 21024122 / (2 + 1 + 0 + 2 + 4 + 1 + 2 + 2).

It is a junction number, because it is equal to n+sod(n) for n = 21024097 and 21024106.

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, 750848 + ... + 750875.

It is an arithmetic number, because the mean of its divisors is an integer number (4505172).

Almost surely, 2^21024122 is an apocalyptic number.

21024122 is a deficient number, since it is larger than the sum of its proper divisors (15017254).

21024122 is a wasteful number, since it uses less digits than its factorization.

21024122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1501732.

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 21024122 is about 4585.2068655623. The cubic root of 21024122 is about 275.9980133582.

Adding to 21024122 its reverse (22142012), we get a palindrome (43166134).

The spelling of 21024122 in words is "twenty-one million, twenty-four thousand, one hundred twenty-two".