2194582121 has 2 divisors, whose sum is σ = 2194582122. Its totient is φ = 2194582120.

The previous prime is 2194582087. The next prime is 2194582199. The reversal of 2194582121 is 1212854912.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2191269721 + 3312400 = 46811^2 + 1820^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2194582121 is a prime.

It is not a weakly prime, because it can be changed into another prime (2194582021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1097291060 + 1097291061.

It is an arithmetic number, because the mean of its divisors is an integer number (1097291061).

Almost surely, 2^2194582121 is an apocalyptic number.

It is an amenable number.

2194582121 is a deficient number, since it is larger than the sum of its proper divisors (1).

2194582121 is an equidigital number, since it uses as much as digits as its factorization.

2194582121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11520, while the sum is 35.

The square root of 2194582121 is about 46846.3672124104. The cubic root of 2194582121 is about 1299.5229257336.

The spelling of 2194582121 in words is "two billion, one hundred ninety-four million, five hundred eighty-two thousand, one hundred twenty-one".