135621503111 has 2 divisors, whose sum is σ = 135621503112. Its totient is φ = 135621503110.

The previous prime is 135621503033. The next prime is 135621503117. The reversal of 135621503111 is 111305126531.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 135621503111 - 2¹⁰ = 135621502087 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135621503117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67810751555 + 67810751556.

It is an arithmetic number, because the mean of its divisors is an integer number (67810751556).

Almost surely, 2^135621503111 is an apocalyptic number.

135621503111 is a deficient number, since it is larger than the sum of its proper divisors (1).

135621503111 is an equidigital number, since it uses as much as digits as its factorization.

135621503111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2700, while the sum is 29.

Adding to 135621503111 its reverse (111305126531), we get a palindrome (246926629642).

The spelling of 135621503111 in words is "one hundred thirty-five billion, six hundred twenty-one million, five hundred three thousand, one hundred eleven".