201021102113 has 6 divisors (see below), whose sum is σ = 217673737974. Its totient is φ = 185557940256.

The previous prime is 201021102103. The next prime is 201021102187. The reversal of 201021102113 is 311201120102.

It can be written as a sum of positive squares in 3 ways, for example, as 583125904 + 200437976209 = 24148^2 + 447703^2 .

It is not a de Polignac number, because 201021102113 - 2¹⁰ = 201021101089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201021102103) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 594736820 + ... + 594737157.

It is an arithmetic number, because the mean of its divisors is an integer number (36278956329).

Almost surely, 2^201021102113 is an apocalyptic number.

It is an amenable number.

201021102113 is a deficient number, since it is larger than the sum of its proper divisors (16652635861).

201021102113 is a wasteful number, since it uses less digits than its factorization.

201021102113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1189474003 (or 1189473990 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 201021102113 its reverse (311201120102), we get a palindrome (512222222215).

The spelling of 201021102113 in words is "two hundred one billion, twenty-one million, one hundred two thousand, one hundred thirteen".