201155131013 has 4 divisors (see below), whose sum is σ = 201156360288. Its totient is φ = 201153901740.

The previous prime is 201155130997. The next prime is 201155131091. The reversal of 201155131013 is 310131551102.

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 201155131013 - 2⁴ = 201155130997 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 201155131013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201155131613) 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, 323081 + ... + 711822.

It is an arithmetic number, because the mean of its divisors is an integer number (50289090072).

Almost surely, 2^201155131013 is an apocalyptic number.

It is an amenable number.

201155131013 is a deficient number, since it is larger than the sum of its proper divisors (1229275).

201155131013 is a wasteful number, since it uses less digits than its factorization.

201155131013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1229274.

The product of its (nonzero) digits is 450, while the sum is 23.

Adding to 201155131013 its reverse (310131551102), we get a palindrome (511286682115).

The spelling of 201155131013 in words is "two hundred one billion, one hundred fifty-five million, one hundred thirty-one thousand, thirteen".