123131041442 has 16 divisors (see below), whose sum is σ = 186382236600. Its totient is φ = 61003928832.

The previous prime is 123131041433. The next prime is 123131041447. The reversal of 123131041442 is 244140131321.

It can be written as a sum of positive squares in 4 ways, for example, as 111321655201 + 11809386241 = 333649^2 + 108671^2 .

It is a super-2 number, since 2×123131041442² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (123131041447) 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 7 ways as a sum of consecutive naturals, for example, 770684 + ... + 916632.

Almost surely, 2^123131041442 is an apocalyptic number.

123131041442 is a deficient number, since it is larger than the sum of its proper divisors (63251195158).

123131041442 is a wasteful number, since it uses less digits than its factorization.

123131041442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149797.

The product of its (nonzero) digits is 2304, while the sum is 26.

Adding to 123131041442 its reverse (244140131321), we get a palindrome (367271172763).

The spelling of 123131041442 in words is "one hundred twenty-three billion, one hundred thirty-one million, forty-one thousand, four hundred forty-two".