20323400242121 has 2 divisors, whose sum is σ = 20323400242122. Its totient is φ = 20323400242120.

The previous prime is 20323400242091. The next prime is 20323400242183. The reversal of 20323400242121 is 12124200432302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16345525561600 + 3977874680521 = 4042960^2 + 1994461^2 .

It is a cyclic number.

It is not a de Polignac number, because 20323400242121 - 2¹⁸ = 20323399979977 is a prime.

It is not a weakly prime, because it can be changed into another prime (20323400247121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10161700121060 + 10161700121061.

It is an arithmetic number, because the mean of its divisors is an integer number (10161700121061).

Almost surely, 2^{20323400242121} is an apocalyptic number.

It is an amenable number.

20323400242121 is a deficient number, since it is larger than the sum of its proper divisors (1).

20323400242121 is an equidigital number, since it uses as much as digits as its factorization.

20323400242121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 20323400242121 its reverse (12124200432302), we get a palindrome (32447600674423).

The spelling of 20323400242121 in words is "twenty trillion, three hundred twenty-three billion, four hundred million, two hundred forty-two thousand, one hundred twenty-one".