2113131101 has 4 divisors (see below), whose sum is σ = 2115123804. Its totient is φ = 2111138400.

The previous prime is 2113131091. The next prime is 2113131109. The reversal of 2113131101 is 1011313112.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1579983001 + 533148100 = 39749^2 + 23090^2 .

It is a cyclic number.

It is not a de Polignac number, because 2113131101 - 2¹⁰ = 2113130077 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 (2113131109) 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, 994760 + ... + 996881.

It is an arithmetic number, because the mean of its divisors is an integer number (528780951).

Almost surely, 2^2113131101 is an apocalyptic number.

It is an amenable number.

2113131101 is a deficient number, since it is larger than the sum of its proper divisors (1992703).

2113131101 is a wasteful number, since it uses less digits than its factorization.

2113131101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1992702.

The product of its (nonzero) digits is 18, while the sum is 14.

The square root of 2113131101 is about 45968.8057382395. The cubic root of 2113131101 is about 1283.2427343849.

Adding to 2113131101 its reverse (1011313112), we get a palindrome (3124444213).

The spelling of 2113131101 in words is "two billion, one hundred thirteen million, one hundred thirty-one thousand, one hundred one".