201061331511 has 4 divisors (see below), whose sum is σ = 268081775352. Its totient is φ = 134040887672.

The previous prime is 201061331489. The next prime is 201061331519. The reversal of 201061331511 is 115133160102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 201061331511 - 2⁶ = 201061331447 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201061331519) 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, 33510221916 + ... + 33510221921.

It is an arithmetic number, because the mean of its divisors is an integer number (67020443838).

Almost surely, 2^201061331511 is an apocalyptic number.

201061331511 is a deficient number, since it is larger than the sum of its proper divisors (67020443841).

201061331511 is an equidigital number, since it uses as much as digits as its factorization.

201061331511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67020443840.

The product of its (nonzero) digits is 540, while the sum is 24.

Adding to 201061331511 its reverse (115133160102), we get a palindrome (316194491613).

The spelling of 201061331511 in words is "two hundred one billion, sixty-one million, three hundred thirty-one thousand, five hundred eleven".