123142031011 has 32 divisors (see below), whose sum is σ = 140809052160. Its totient is φ = 107095065600.

The previous prime is 123142030969. The next prime is 123142031017. The reversal of 123142031011 is 110130241321.

It is a cyclic number.

It is not a de Polignac number, because 123142031011 - 2¹⁹ = 123141506723 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 123142031011.

It is not an unprimeable number, because it can be changed into a prime (123142031017) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 954900 + ... + 1076158.

It is an arithmetic number, because the mean of its divisors is an integer number (4400282880).

Almost surely, 2^123142031011 is an apocalyptic number.

123142031011 is a deficient number, since it is larger than the sum of its proper divisors (17667021149).

123142031011 is a wasteful number, since it uses less digits than its factorization.

123142031011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121395.

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

Adding to 123142031011 its reverse (110130241321), we get a palindrome (233272272332).

The spelling of 123142031011 in words is "one hundred twenty-three billion, one hundred forty-two million, thirty-one thousand, eleven".