2021206113 has 6 divisors (see below), whose sum is σ = 2919519954. Its totient is φ = 1347470736.

The previous prime is 2021206097. The next prime is 2021206171. The reversal of 2021206113 is 3116021202.

It can be written as a sum of positive squares in only one way, i.e., 1607368464 + 413837649 = 40092^2 + 20343^2 .

It is not a de Polignac number, because 2021206113 - 2⁴ = 2021206097 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2021206193) 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, 112289220 + ... + 112289237.

It is an arithmetic number, because the mean of its divisors is an integer number (486586659).

Almost surely, 2^2021206113 is an apocalyptic number.

It is an amenable number.

2021206113 is a deficient number, since it is larger than the sum of its proper divisors (898313841).

2021206113 is a wasteful number, since it uses less digits than its factorization.

2021206113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224578463 (or 224578460 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 2021206113 is about 44957.8259372047. The cubic root of 2021206113 is about 1264.3584081593.

Adding to 2021206113 its reverse (3116021202), we get a palindrome (5137227315).

The spelling of 2021206113 in words is "two billion, twenty-one million, two hundred six thousand, one hundred thirteen".