123131211202 has 8 divisors (see below), whose sum is σ = 184703668812. Its totient is φ = 61563321600.

The previous prime is 123131211139. The next prime is 123131211209. The reversal of 123131211202 is 202112131321.

It can be written as a sum of positive squares in 2 ways, for example, as 120797258481 + 2333952721 = 347559^2 + 48311^2 .

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

It is a super-2 number, since 2×123131211202² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 123131211202.

It is not an unprimeable number, because it can be changed into a prime (123131211209) 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, 1073799 + ... + 1182922.

Almost surely, 2^123131211202 is an apocalyptic number.

123131211202 is a deficient number, since it is larger than the sum of its proper divisors (61572457610).

123131211202 is a wasteful number, since it uses less digits than its factorization.

123131211202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2284004.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 123131211202 its reverse (202112131321), we get a palindrome (325243342523).

The spelling of 123131211202 in words is "one hundred twenty-three billion, one hundred thirty-one million, two hundred eleven thousand, two hundred two".