20430112121123 has 2 divisors, whose sum is σ = 20430112121124. Its totient is φ = 20430112121122.

The previous prime is 20430112121099. The next prime is 20430112121129. The reversal of 20430112121123 is 32112121103402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20430112121123 - 2⁶ = 20430112121059 is a prime.

It is a super-2 number, since 2×20430112121123² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20430112121129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10215056060561 + 10215056060562.

It is an arithmetic number, because the mean of its divisors is an integer number (10215056060562).

Almost surely, 2^{20430112121123} is an apocalyptic number.

20430112121123 is a deficient number, since it is larger than the sum of its proper divisors (1).

20430112121123 is an equidigital number, since it uses as much as digits as its factorization.

20430112121123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 20430112121123 its reverse (32112121103402), we get a palindrome (52542233224525).

The spelling of 20430112121123 in words is "twenty trillion, four hundred thirty billion, one hundred twelve million, one hundred twenty-one thousand, one hundred twenty-three".