135531213001 has 4 divisors (see below), whose sum is σ = 136138976512. Its totient is φ = 134923449492.

The previous prime is 135531212983. The next prime is 135531213019. The reversal of 135531213001 is 100312135531.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 100312135531 = 23 ⋅4361397197.

It is an interprime number because it is at equal distance from previous prime (135531212983) and next prime (135531213019).

It is a cyclic number.

It is not a de Polignac number, because 135531213001 - 2⁵ = 135531212969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135531213071) 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, 303881421 + ... + 303881866.

It is an arithmetic number, because the mean of its divisors is an integer number (34034744128).

Almost surely, 2^135531213001 is an apocalyptic number.

It is an amenable number.

135531213001 is a deficient number, since it is larger than the sum of its proper divisors (607763511).

135531213001 is an equidigital number, since it uses as much as digits as its factorization.

135531213001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 607763510.

The product of its (nonzero) digits is 1350, while the sum is 25.

Adding to 135531213001 its reverse (100312135531), we get a palindrome (235843348532).

The spelling of 135531213001 in words is "one hundred thirty-five billion, five hundred thirty-one million, two hundred thirteen thousand, one".