135011221545 has 24 divisors (see below), whose sum is σ = 223211083968. Its totient is φ = 69683203680.

The previous prime is 135011221517. The next prime is 135011221549. The reversal of 135011221545 is 545122110531.

It is not a de Polignac number, because 135011221545 - 2⁶ = 135011221481 is a prime.

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 23 ways as a sum of consecutive naturals, for example, 4668597 + ... + 4697426.

It is an arithmetic number, because the mean of its divisors is an integer number (9300461832).

Almost surely, 2^135011221545 is an apocalyptic number.

135011221545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

135011221545 is a deficient number, since it is larger than the sum of its proper divisors (88199862423).

135011221545 is an equidigital number, since it uses as much as digits as its factorization.

135011221545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9366093 (or 9366062 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 30.

The spelling of 135011221545 in words is "one hundred thirty-five billion, eleven million, two hundred twenty-one thousand, five hundred forty-five".