123240442101 has 16 divisors (see below), whose sum is σ = 187804091904. Its totient is φ = 70419685104.

The previous prime is 123240442079. The next prime is 123240442103. The reversal of 123240442101 is 101244042321.

It is not a de Polignac number, because 123240442101 - 2¹⁹ = 123239917813 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123240442103) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 336906 + ... + 599988.

It is an arithmetic number, because the mean of its divisors is an integer number (11737755744).

Almost surely, 2^123240442101 is an apocalyptic number.

It is an amenable number.

123240442101 is a deficient number, since it is larger than the sum of its proper divisors (64563649803).

123240442101 is a wasteful number, since it uses less digits than its factorization.

123240442101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285400.

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 123240442101 its reverse (101244042321), we get a palindrome (224484484422).

The spelling of 123240442101 in words is "one hundred twenty-three billion, two hundred forty million, four hundred forty-two thousand, one hundred one".