45425012021 has 4 divisors (see below), whose sum is σ = 45893311212. Its totient is φ = 44956712832.

The previous prime is 45425011979. The next prime is 45425012057. The reversal of 45425012021 is 12021052454.

45425012021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12021052454 = 2 ⋅6010526227.

It can be written as a sum of positive squares in 2 ways, for example, as 18368380900 + 27056631121 = 135530^2 + 164489^2 .

It is a cyclic number.

It is not a de Polignac number, because 45425012021 - 2¹⁰ = 45425010997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45425015021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 234149450 + ... + 234149643.

It is an arithmetic number, because the mean of its divisors is an integer number (11473327803).

Almost surely, 2^45425012021 is an apocalyptic number.

It is an amenable number.

45425012021 is a deficient number, since it is larger than the sum of its proper divisors (468299191).

45425012021 is an equidigital number, since it uses as much as digits as its factorization.

45425012021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 468299190.

The product of its (nonzero) digits is 3200, while the sum is 26.

Adding to 45425012021 its reverse (12021052454), we get a palindrome (57446064475).

The spelling of 45425012021 in words is "forty-five billion, four hundred twenty-five million, twelve thousand, twenty-one".