22121315 has 8 divisors (see below), whose sum is σ = 26749008. Its totient is φ = 17561440.

The previous prime is 22121303. The next prime is 22121329. The reversal of 22121315 is 51312122.

It is a happy number.

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

It is not a de Polignac number, because 22121315 - 2⁸ = 22121059 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22121293 and 22121302.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16232 + ... + 17541.

It is an arithmetic number, because the mean of its divisors is an integer number (3343626).

Almost surely, 2^22121315 is an apocalyptic number.

22121315 is a deficient number, since it is larger than the sum of its proper divisors (4627693).

22121315 is a wasteful number, since it uses less digits than its factorization.

22121315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33909.

The product of its digits is 120, while the sum is 17.

The square root of 22121315 is about 4703.3302031646. The cubic root of 22121315 is about 280.7180337962.

Adding to 22121315 its reverse (51312122), we get a palindrome (73433437).

The spelling of 22121315 in words is "twenty-two million, one hundred twenty-one thousand, three hundred fifteen".