123243021202 has 12 divisors (see below), whose sum is σ = 215046496350. Its totient is φ = 52818437616.

The previous prime is 123243021193. The next prime is 123243021203. The reversal of 123243021202 is 202120342321.

It can be written as a sum of positive squares in only one way, i.e., 70953509641 + 52289511561 = 266371^2 + 228669^2 .

It is not an unprimeable number, because it can be changed into a prime (123243021203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 628790827 + ... + 628791022.

Almost surely, 2^123243021202 is an apocalyptic number.

123243021202 is a deficient number, since it is larger than the sum of its proper divisors (91803475148).

123243021202 is a wasteful number, since it uses less digits than its factorization.

123243021202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1257581865 (or 1257581858 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 123243021202 its reverse (202120342321), we get a palindrome (325363363523).

The spelling of 123243021202 in words is "one hundred twenty-three billion, two hundred forty-three million, twenty-one thousand, two hundred two".