20343002121 has 32 divisors (see below), whose sum is σ = 32559941120. Its totient is φ = 12478707072.

The previous prime is 20343002083. The next prime is 20343002129. The reversal of 20343002121 is 12120034302.

20343002121 is a `hidden beast` number, since 20 + 3 + 430 + 0 + 212 + 1 = 666.

It is not a de Polignac number, because 20343002121 - 2¹⁴ = 20342985737 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20343002094 and 20343002103.

It is not an unprimeable number, because it can be changed into a prime (20343002129) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17280 + ... + 202446.

It is an arithmetic number, because the mean of its divisors is an integer number (1017498160).

Almost surely, 2^20343002121 is an apocalyptic number.

It is an amenable number.

20343002121 is a deficient number, since it is larger than the sum of its proper divisors (12216938999).

20343002121 is a wasteful number, since it uses less digits than its factorization.

20343002121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185502 (or 185496 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 20343002121 its reverse (12120034302), we get a palindrome (32463036423).

The spelling of 20343002121 in words is "twenty billion, three hundred forty-three million, two thousand, one hundred twenty-one".