21135119 has 2 divisors, whose sum is σ = 21135120. Its totient is φ = 21135118.

The previous prime is 21135109. The next prime is 21135143. The reversal of 21135119 is 91153112.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21135119 is a prime.

It is a super-2 number, since 2×21135119² = 893386510288322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21135094 and 21135103.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21135109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10567559 + 10567560.

It is an arithmetic number, because the mean of its divisors is an integer number (10567560).

Almost surely, 2^21135119 is an apocalyptic number.

21135119 is a deficient number, since it is larger than the sum of its proper divisors (1).

21135119 is an equidigital number, since it uses as much as digits as its factorization.

21135119 is an evil number, because the sum of its binary digits is even.

The product of its digits is 270, while the sum is 23.

The square root of 21135119 is about 4597.2947480013. The cubic root of 21135119 is about 276.4828722358.

The spelling of 21135119 in words is "twenty-one million, one hundred thirty-five thousand, one hundred nineteen".