2113210181 has 2 divisors, whose sum is σ = 2113210182. Its totient is φ = 2113210180.

The previous prime is 2113210171. The next prime is 2113210241. The reversal of 2113210181 is 1810123112.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1746487681 + 366722500 = 41791^2 + 19150^2 .

It is a cyclic number.

It is not a de Polignac number, because 2113210181 - 2²² = 2109015877 is a prime.

It is a super-2 number, since 2×2113210181² = 8931314538164105522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2113210171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1056605090 + 1056605091.

It is an arithmetic number, because the mean of its divisors is an integer number (1056605091).

Almost surely, 2^2113210181 is an apocalyptic number.

It is an amenable number.

2113210181 is a deficient number, since it is larger than the sum of its proper divisors (1).

2113210181 is an equidigital number, since it uses as much as digits as its factorization.

2113210181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 20.

The square root of 2113210181 is about 45969.6658787075. The cubic root of 2113210181 is about 1283.2587418425.

Adding to 2113210181 its reverse (1810123112), we get a palindrome (3923333293).

It can be divided in two parts, 21132 and 10181, that added together give a palindrome (31313).

The spelling of 2113210181 in words is "two billion, one hundred thirteen million, two hundred ten thousand, one hundred eighty-one".