425123413021 has 2 divisors, whose sum is σ = 425123413022. Its totient is φ = 425123413020.

The previous prime is 425123413009. The next prime is 425123413147. The reversal of 425123413021 is 120314321524.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 231293664900 + 193829748121 = 480930^2 + 440261^2 .

It is a cyclic number.

It is not a de Polignac number, because 425123413021 - 2¹³ = 425123404829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (425123413921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212561706510 + 212561706511.

It is an arithmetic number, because the mean of its divisors is an integer number (212561706511).

Almost surely, 2^425123413021 is an apocalyptic number.

It is an amenable number.

425123413021 is a deficient number, since it is larger than the sum of its proper divisors (1).

425123413021 is an equidigital number, since it uses as much as digits as its factorization.

425123413021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5760, while the sum is 28.

Adding to 425123413021 its reverse (120314321524), we get a palindrome (545437734545).

The spelling of 425123413021 in words is "four hundred twenty-five billion, one hundred twenty-three million, four hundred thirteen thousand, twenty-one".