21225119 has 2 divisors, whose sum is σ = 21225120. Its totient is φ = 21225118.

The previous prime is 21225103. The next prime is 21225121. The reversal of 21225119 is 91152212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21225119 - 2⁴ = 21225103 is a prime.

It is a super-2 number, since 2×21225119² = 901011353128322, which contains 22 as substring.

Together with 21225121, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 21225094 and 21225103.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21225179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10612559 + 10612560.

It is an arithmetic number, because the mean of its divisors is an integer number (10612560).

Almost surely, 2^21225119 is an apocalyptic number.

21225119 is a deficient number, since it is larger than the sum of its proper divisors (1).

21225119 is an equidigital number, since it uses as much as digits as its factorization.

21225119 is an evil number, because the sum of its binary digits is even.

The product of its digits is 360, while the sum is 23.

The square root of 21225119 is about 4607.0727148592. The cubic root of 21225119 is about 276.8747669031.

The spelling of 21225119 in words is "twenty-one million, two hundred twenty-five thousand, one hundred nineteen".