135101621 has 2 divisors, whose sum is σ = 135101622. Its totient is φ = 135101620.

The previous prime is 135101599. The next prime is 135101623. The reversal of 135101621 is 126101531.

135101621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 99221521 + 35880100 = 9961^2 + 5990^2 .

It is a cyclic number.

It is not a de Polignac number, because 135101621 - 2¹⁸ = 134839477 is a prime.

Together with 135101623, 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 = 135101593 and 135101602.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135101623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67550810 + 67550811.

It is an arithmetic number, because the mean of its divisors is an integer number (67550811).

Almost surely, 2^135101621 is an apocalyptic number.

It is an amenable number.

135101621 is a deficient number, since it is larger than the sum of its proper divisors (1).

135101621 is an equidigital number, since it uses as much as digits as its factorization.

135101621 is an evil number, because the sum of its binary digits is even.

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

The square root of 135101621 is about 11623.3222875390. The cubic root of 135101621 is about 513.1214698418.

The spelling of 135101621 in words is "one hundred thirty-five million, one hundred one thousand, six hundred twenty-one".