135021611 has 2 divisors, whose sum is σ = 135021612. Its totient is φ = 135021610.

The previous prime is 135021589. The next prime is 135021613. The reversal of 135021611 is 116120531.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135021611 is a prime.

Together with 135021613, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (135021613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67510805 + 67510806.

It is an arithmetic number, because the mean of its divisors is an integer number (67510806).

Almost surely, 2^135021611 is an apocalyptic number.

135021611 is a deficient number, since it is larger than the sum of its proper divisors (1).

135021611 is an equidigital number, since it uses as much as digits as its factorization.

135021611 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 135021611 is about 11619.8799907744. The cubic root of 135021611 is about 513.0201560908.

The spelling of 135021611 in words is "one hundred thirty-five million, twenty-one thousand, six hundred eleven".