21122414 has 8 divisors (see below), whose sum is σ = 33351240. Its totient is φ = 10005336.

The previous prime is 21122399. The next prime is 21122419. The reversal of 21122414 is 41422112.

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

It is a junction number, because it is equal to n+sod(n) for n = 21122392 and 21122401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21122419) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 277889 + ... + 277964.

It is an arithmetic number, because the mean of its divisors is an integer number (4168905).

Almost surely, 2^21122414 is an apocalyptic number.

21122414 is a deficient number, since it is larger than the sum of its proper divisors (12228826).

21122414 is a wasteful number, since it uses less digits than its factorization.

21122414 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 555874.

The product of its digits is 128, while the sum is 17.

The square root of 21122414 is about 4595.9127493894. The cubic root of 21122414 is about 276.4274602144.

Adding to 21122414 its reverse (41422112), we get a palindrome (62544526).

The spelling of 21122414 in words is "twenty-one million, one hundred twenty-two thousand, four hundred fourteen".