125121123 has 24 divisors (see below), whose sum is σ = 185693040. Its totient is φ = 81153600.

The previous prime is 125121119. The next prime is 125121131. The reversal of 125121123 is 321121521.

It is not a de Polignac number, because 125121123 - 2² = 125121119 is a prime.

It is a super-2 number, since 2×125121123² = 31310590841562258, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 125121096 and 125121105.

It is not an unprimeable number, because it can be changed into a prime (125121103) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 52465 + ... + 54797.

It is an arithmetic number, because the mean of its divisors is an integer number (7737210).

Almost surely, 2^125121123 is an apocalyptic number.

125121123 is a deficient number, since it is larger than the sum of its proper divisors (60571917).

125121123 is a wasteful number, since it uses less digits than its factorization.

125121123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2499 (or 2496 counting only the distinct ones).

The product of its digits is 120, while the sum is 18.

The square root of 125121123 is about 11185.7553611725. The cubic root of 125121123 is about 500.1614451986.

Adding to 125121123 its reverse (321121521), we get a palindrome (446242644).

The spelling of 125121123 in words is "one hundred twenty-five million, one hundred twenty-one thousand, one hundred twenty-three".