20113101 has 6 divisors (see below), whose sum is σ = 29052270. Its totient is φ = 13408728.

The previous prime is 20113099. The next prime is 20113123. The reversal of 20113101 is 10131102.

It can be written as a sum of positive squares in only one way, i.e., 16597476 + 3515625 = 4074^2 + 1875^2 .

It is not a de Polignac number, because 20113101 - 2¹ = 20113099 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 2234789 = 20113101 / (2 + 0 + 1 + 1 + 3 + 1 + 0 + 1).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20115101) 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, 1117386 + ... + 1117403.

It is an arithmetic number, because the mean of its divisors is an integer number (4842045).

Almost surely, 2^20113101 is an apocalyptic number.

It is an amenable number.

20113101 is a deficient number, since it is larger than the sum of its proper divisors (8939169).

20113101 is a wasteful number, since it uses less digits than its factorization.

20113101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2234795 (or 2234792 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 9.

The square root of 20113101 is about 4484.7632044513. The cubic root of 20113101 is about 271.9524724124.

Adding to 20113101 its reverse (10131102), we get a palindrome (30244203).

The spelling of 20113101 in words is "twenty million, one hundred thirteen thousand, one hundred one".