135121063531 has 8 divisors (see below), whose sum is σ = 135495640800. Its totient is φ = 134746997760.

The previous prime is 135121063513. The next prime is 135121063549. The reversal of 135121063531 is 135360121531.

It is an interprime number because it is at equal distance from previous prime (135121063513) and next prime (135121063549).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 135121063531 - 2⁷ = 135121063403 is a prime.

It is a super-2 number, since 2×135121063531² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 135121063493 and 135121063502.

It is not an unprimeable number, because it can be changed into a prime (135121061531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 404250 + ... + 658528.

It is an arithmetic number, because the mean of its divisors is an integer number (16936955100).

Almost surely, 2^135121063531 is an apocalyptic number.

135121063531 is a deficient number, since it is larger than the sum of its proper divisors (374577269).

135121063531 is an equidigital number, since it uses as much as digits as its factorization.

135121063531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255749.

The product of its (nonzero) digits is 8100, while the sum is 31.

The spelling of 135121063531 in words is "one hundred thirty-five billion, one hundred twenty-one million, sixty-three thousand, five hundred thirty-one".