125516061121 has 8 divisors (see below), whose sum is σ = 144981118944. Its totient is φ = 107393421120.

The previous prime is 125516061109. The next prime is 125516061193. The reversal of 125516061121 is 121160615521.

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

It is a cyclic number.

It is not a de Polignac number, because 125516061121 - 2¹¹ = 125516059073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125516061221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 335604255 + ... + 335604628.

It is an arithmetic number, because the mean of its divisors is an integer number (18122639868).

Almost surely, 2^125516061121 is an apocalyptic number.

125516061121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

125516061121 is a deficient number, since it is larger than the sum of its proper divisors (19465057823).

125516061121 is a wasteful number, since it uses less digits than its factorization.

125516061121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 671208911.

The product of its (nonzero) digits is 3600, while the sum is 31.

Adding to 125516061121 its reverse (121160615521), we get a palindrome (246676676642).

The spelling of 125516061121 in words is "one hundred twenty-five billion, five hundred sixteen million, sixty-one thousand, one hundred twenty-one".