136204503035021 has 4 divisors (see below), whose sum is σ = 140598196681344. Its totient is φ = 131810809388700.

The previous prime is 136204503034997. The next prime is 136204503035023. The reversal of 136204503035021 is 120530305402631.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 136204503035021 - 2¹⁰ = 136204503033997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136204503035023) 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, 2196846823115 + ... + 2196846823176.

It is an arithmetic number, because the mean of its divisors is an integer number (35149549170336).

Almost surely, 2^{136204503035021} is an apocalyptic number.

It is an amenable number.

136204503035021 is a deficient number, since it is larger than the sum of its proper divisors (4393693646323).

136204503035021 is an equidigital number, since it uses as much as digits as its factorization.

136204503035021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4393693646322.

The product of its (nonzero) digits is 64800, while the sum is 35.

Adding to 136204503035021 its reverse (120530305402631), we get a palindrome (256734808437652).

The spelling of 136204503035021 in words is "one hundred thirty-six trillion, two hundred four billion, five hundred three million, thirty-five thousand, twenty-one".