123421502045 has 8 divisors (see below), whose sum is σ = 148336860600. Its totient is φ = 98583162880.

The previous prime is 123421502033. The next prime is 123421502059. The reversal of 123421502045 is 540205124321.

It can be written as a sum of positive squares in 4 ways, for example, as 8975288644 + 114446213401 = 94738^2 + 338299^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 123421502045 - 2⁶ = 123421501981 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 123421501999 and 123421502017.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19251320 + ... + 19257729.

It is an arithmetic number, because the mean of its divisors is an integer number (18542107575).

Almost surely, 2^123421502045 is an apocalyptic number.

It is an amenable number.

123421502045 is a deficient number, since it is larger than the sum of its proper divisors (24915358555).

123421502045 is an equidigital number, since it uses as much as digits as its factorization.

123421502045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38509695.

The product of its (nonzero) digits is 9600, while the sum is 29.

Adding to 123421502045 its reverse (540205124321), we get a palindrome (663626626366).

The spelling of 123421502045 in words is "one hundred twenty-three billion, four hundred twenty-one million, five hundred two thousand, forty-five".