123011220023144 has 8 divisors (see below), whose sum is σ = 230646037543410. Its totient is φ = 61505610011568.

The previous prime is 123011220023137. The next prime is 123011220023147. The reversal of 123011220023144 is 441320022110321.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 107158479620644 + 15852740402500 = 10351738^2 + 3981550^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (123011220023147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7688201251439 + ... + 7688201251454.

Almost surely, 2^{123011220023144} is an apocalyptic number.

It is an amenable number.

123011220023144 is a deficient number, since it is larger than the sum of its proper divisors (107634817520266).

123011220023144 is a wasteful number, since it uses less digits than its factorization.

123011220023144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15376402502899 (or 15376402502895 counting only the distinct ones).

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

Adding to 123011220023144 its reverse (441320022110321), we get a palindrome (564331242133465).

The spelling of 123011220023144 in words is "one hundred twenty-three trillion, eleven billion, two hundred twenty million, twenty-three thousand, one hundred forty-four".