123421502225 has 24 divisors (see below), whose sum is σ = 175669738560. Its totient is φ = 84262288320.

The previous prime is 123421502177. The next prime is 123421502227. The reversal of 123421502225 is 522205124321.

It is a happy number.

It is not a de Polignac number, because 123421502225 - 2⁶ = 123421502161 is a prime.

It is a super-2 number, since 2×123421502225² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (123421502227) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1499807 + ... + 1579956.

It is an arithmetic number, because the mean of its divisors is an integer number (7319572440).

Almost surely, 2^123421502225 is an apocalyptic number.

It is an amenable number.

123421502225 is a deficient number, since it is larger than the sum of its proper divisors (52248236335).

123421502225 is a wasteful number, since it uses less digits than its factorization.

123421502225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3080009 (or 3080004 counting only the distinct ones).

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

Adding to 123421502225 its reverse (522205124321), we get a palindrome (645626626546).

The spelling of 123421502225 in words is "one hundred twenty-three billion, four hundred twenty-one million, five hundred two thousand, two hundred twenty-five".