20343774232121 has 2 divisors, whose sum is σ = 20343774232122. Its totient is φ = 20343774232120.

The previous prime is 20343774232063. The next prime is 20343774232237. The reversal of 20343774232121 is 12123247734302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15687936640000 + 4655837592121 = 3960800^2 + 2157739^2 .

It is a cyclic number.

It is not a de Polignac number, because 20343774232121 - 2⁶ = 20343774232057 is a prime.

It is not a weakly prime, because it can be changed into another prime (20343774232721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10171887116060 + 10171887116061.

It is an arithmetic number, because the mean of its divisors is an integer number (10171887116061).

Almost surely, 2^{20343774232121} is an apocalyptic number.

It is an amenable number.

20343774232121 is a deficient number, since it is larger than the sum of its proper divisors (1).

20343774232121 is an equidigital number, since it uses as much as digits as its factorization.

20343774232121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 338688, while the sum is 41.

The spelling of 20343774232121 in words is "twenty trillion, three hundred forty-three billion, seven hundred seventy-four million, two hundred thirty-two thousand, one hundred twenty-one".