123154154131 has 4 divisors (see below), whose sum is σ = 123155062264. Its totient is φ = 123153246000.

The previous prime is 123154154117. The next prime is 123154154183. The reversal of 123154154131 is 131451451321.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 131451451321 = 17 ⋅7732438313.

It is a cyclic number.

It is not a de Polignac number, because 123154154131 - 2¹¹ = 123154152083 is a prime.

It is a super-2 number, since 2×123154154131² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123154154093 and 123154154102.

It is not an unprimeable number, because it can be changed into a prime (123154154231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 205170 + ... + 537031.

It is an arithmetic number, because the mean of its divisors is an integer number (30788765566).

Almost surely, 2^123154154131 is an apocalyptic number.

123154154131 is a deficient number, since it is larger than the sum of its proper divisors (908133).

123154154131 is an equidigital number, since it uses as much as digits as its factorization.

123154154131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 908132.

The product of its digits is 7200, while the sum is 31.

The spelling of 123154154131 in words is "one hundred twenty-three billion, one hundred fifty-four million, one hundred fifty-four thousand, one hundred thirty-one".