20201434223123 has 2 divisors, whose sum is σ = 20201434223124. Its totient is φ = 20201434223122.

The previous prime is 20201434223119. The next prime is 20201434223207. The reversal of 20201434223123 is 32132243410202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20201434223123 - 2² = 20201434223119 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (20201434226123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10100717111561 + 10100717111562.

It is an arithmetic number, because the mean of its divisors is an integer number (10100717111562).

Almost surely, 2^{20201434223123} is an apocalyptic number.

20201434223123 is a deficient number, since it is larger than the sum of its proper divisors (1).

20201434223123 is an equidigital number, since it uses as much as digits as its factorization.

20201434223123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 29.

Adding to 20201434223123 its reverse (32132243410202), we get a palindrome (52333677633325).

The spelling of 20201434223123 in words is "twenty trillion, two hundred one billion, four hundred thirty-four million, two hundred twenty-three thousand, one hundred twenty-three".