135011221547 has 4 divisors (see below), whose sum is σ = 135241224216. Its totient is φ = 134781218880.

The previous prime is 135011221517. The next prime is 135011221549. The reversal of 135011221547 is 745122110531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 745122110531 = 331 ⋅2251124201.

It is a cyclic number.

It is not a de Polignac number, because 135011221547 - 2⁸ = 135011221291 is a prime.

It is a super-2 number, since 2×135011221547² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135011221549) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115000454 + ... + 115001627.

It is an arithmetic number, because the mean of its divisors is an integer number (33810306054).

Almost surely, 2^135011221547 is an apocalyptic number.

135011221547 is a deficient number, since it is larger than the sum of its proper divisors (230002669).

135011221547 is an equidigital number, since it uses as much as digits as its factorization.

135011221547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230002668.

The product of its (nonzero) digits is 8400, while the sum is 32.

The spelling of 135011221547 in words is "one hundred thirty-five billion, eleven million, two hundred twenty-one thousand, five hundred forty-seven".