201020101211111 has 16 divisors (see below), whose sum is σ = 253163061279744. Its totient is φ = 155350060324704.

The previous prime is 201020101210991. The next prime is 201020101211113. The reversal of 201020101211111 is 111112101020102.

It is not a de Polignac number, because 201020101211111 - 2²⁶ = 201020034102247 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201020101211113) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25686183311 + ... + 25686191136.

It is an arithmetic number, because the mean of its divisors is an integer number (15822691329984).

Almost surely, 2^{201020101211111} is an apocalyptic number.

201020101211111 is a deficient number, since it is larger than the sum of its proper divisors (52142960068633).

201020101211111 is a wasteful number, since it uses less digits than its factorization.

201020101211111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51372374510.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 201020101211111 its reverse (111112101020102), we get a palindrome (312132202231213).

The spelling of 201020101211111 in words is "two hundred one trillion, twenty billion, one hundred one million, two hundred eleven thousand, one hundred eleven".