135110021615 has 4 divisors (see below), whose sum is σ = 162132025944. Its totient is φ = 108088017288.

The previous prime is 135110021561. The next prime is 135110021639. The reversal of 135110021615 is 516120011531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 516120011531 = 811 ⋅636399521.

It is a cyclic number.

It is not a de Polignac number, because 135110021615 - 2⁶ = 135110021551 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13511002157 + ... + 13511002166.

It is an arithmetic number, because the mean of its divisors is an integer number (40533006486).

Almost surely, 2^135110021615 is an apocalyptic number.

135110021615 is a deficient number, since it is larger than the sum of its proper divisors (27022004329).

135110021615 is an equidigital number, since it uses as much as digits as its factorization.

135110021615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27022004328.

The product of its (nonzero) digits is 900, while the sum is 26.

The spelling of 135110021615 in words is "one hundred thirty-five billion, one hundred ten million, twenty-one thousand, six hundred fifteen".