123144020111 has 8 divisors (see below), whose sum is σ = 140761979904. Its totient is φ = 105532549560.

The previous prime is 123144020053. The next prime is 123144020137. The reversal of 123144020111 is 111020441321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123144020111 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123144020141) 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, 1581575 + ... + 1657608.

It is an arithmetic number, because the mean of its divisors is an integer number (17595247488).

Almost surely, 2^123144020111 is an apocalyptic number.

123144020111 is a deficient number, since it is larger than the sum of its proper divisors (17617959793).

123144020111 is an equidigital number, since it uses as much as digits as its factorization.

123144020111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3244621.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 123144020111 its reverse (111020441321), we get a palindrome (234164461432).

The spelling of 123144020111 in words is "one hundred twenty-three billion, one hundred forty-four million, twenty thousand, one hundred eleven".