123131320202 has 32 divisors (see below), whose sum is σ = 203359806144. Its totient is φ = 55450137600.

The previous prime is 123131320187. The next prime is 123131320217. The reversal of 123131320202 is 202023131321.

It is an interprime number because it is at equal distance from previous prime (123131320187) and next prime (123131320217).

It is a super-2 number, since 2×123131320202² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1731818 + ... + 1801514.

It is an arithmetic number, because the mean of its divisors is an integer number (6354993942).

Almost surely, 2^123131320202 is an apocalyptic number.

123131320202 is a deficient number, since it is larger than the sum of its proper divisors (80228485942).

123131320202 is a wasteful number, since it uses less digits than its factorization.

123131320202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70454.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 123131320202 its reverse (202023131321), we get a palindrome (325154451523).

The spelling of 123131320202 in words is "one hundred twenty-three billion, one hundred thirty-one million, three hundred twenty thousand, two hundred two".