22121447 has 2 divisors, whose sum is σ = 22121448. Its totient is φ = 22121446.

The previous prime is 22121431. The next prime is 22121483. The reversal of 22121447 is 74412122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22121447 - 2⁴ = 22121431 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22121347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11060723 + 11060724.

It is an arithmetic number, because the mean of its divisors is an integer number (11060724).

Almost surely, 2^22121447 is an apocalyptic number.

22121447 is a deficient number, since it is larger than the sum of its proper divisors (1).

22121447 is an equidigital number, since it uses as much as digits as its factorization.

22121447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 896, while the sum is 23.

The square root of 22121447 is about 4703.3442357540. The cubic root of 22121447 is about 280.7185921522.

Adding to 22121447 its reverse (74412122), we get a palindrome (96533569).

The spelling of 22121447 in words is "twenty-two million, one hundred twenty-one thousand, four hundred forty-seven".