2161132133 has 2 divisors, whose sum is σ = 2161132134. Its totient is φ = 2161132132.

The previous prime is 2161132121. The next prime is 2161132153. The reversal of 2161132133 is 3312311612.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1539228289 + 621903844 = 39233^2 + 24938^2 .

It is a cyclic number.

It is not a de Polignac number, because 2161132133 - 2²⁰ = 2160083557 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2161132099 and 2161132108.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2161132153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1080566066 + 1080566067.

It is an arithmetic number, because the mean of its divisors is an integer number (1080566067).

Almost surely, 2^2161132133 is an apocalyptic number.

It is an amenable number.

2161132133 is a deficient number, since it is larger than the sum of its proper divisors (1).

2161132133 is an equidigital number, since it uses as much as digits as its factorization.

2161132133 is an evil number, because the sum of its binary digits is even.

The product of its digits is 648, while the sum is 23.

The square root of 2161132133 is about 46487.9783707573. The cubic root of 2161132133 is about 1292.8866177777.

Adding to 2161132133 its reverse (3312311612), we get a palindrome (5473443745).

The spelling of 2161132133 in words is "two billion, one hundred sixty-one million, one hundred thirty-two thousand, one hundred thirty-three".