123311355142 has 16 divisors (see below), whose sum is σ = 195861138480. Its totient is φ = 58024816128.

The previous prime is 123311355133. The next prime is 123311355143. The reversal of 123311355142 is 241553113321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123311355143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 398209 + ... + 636547.

It is an arithmetic number, because the mean of its divisors is an integer number (12241321155).

Almost surely, 2^123311355142 is an apocalyptic number.

123311355142 is a deficient number, since it is larger than the sum of its proper divisors (72549783338).

123311355142 is a wasteful number, since it uses less digits than its factorization.

123311355142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253575.

The product of its digits is 10800, while the sum is 31.

Adding to 123311355142 its reverse (241553113321), we get a palindrome (364864468463).

The spelling of 123311355142 in words is "one hundred twenty-three billion, three hundred eleven million, three hundred fifty-five thousand, one hundred forty-two".