123111401254 has 4 divisors (see below), whose sum is σ = 184667101884. Its totient is φ = 61555700626.

The previous prime is 123111401233. The next prime is 123111401263. The reversal of 123111401254 is 452104111321.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30777850312 + ... + 30777850315.

It is an arithmetic number, because the mean of its divisors is an integer number (46166775471).

Almost surely, 2^123111401254 is an apocalyptic number.

123111401254 is a deficient number, since it is larger than the sum of its proper divisors (61555700630).

123111401254 is an equidigital number, since it uses as much as digits as its factorization.

123111401254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61555700629.

The product of its (nonzero) digits is 960, while the sum is 25.

Adding to 123111401254 its reverse (452104111321), we get a palindrome (575215512575).

The spelling of 123111401254 in words is "one hundred twenty-three billion, one hundred eleven million, four hundred one thousand, two hundred fifty-four".