121501125 has 48 divisors (see below), whose sum is σ = 231946416. Its totient is φ = 60979200.

The previous prime is 121501117. The next prime is 121501139. The reversal of 121501125 is 521105121.

It can be written as a sum of positive squares in 8 ways, for example, as 25735329 + 95765796 = 5073^2 + 9786^2 .

It is not a de Polignac number, because 121501125 - 2³ = 121501117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121501098 and 121501107.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 15949 + ... + 22301.

It is an arithmetic number, because the mean of its divisors is an integer number (4832217).

Almost surely, 2^121501125 is an apocalyptic number.

121501125 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121501125 is a deficient number, since it is larger than the sum of its proper divisors (110445291).

121501125 is a wasteful number, since it uses less digits than its factorization.

121501125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6391 (or 6378 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 18.

The square root of 121501125 is about 11022.7548734425. The cubic root of 121501125 is about 495.2906159995.

Adding to 121501125 its reverse (521105121), we get a palindrome (642606246).

The spelling of 121501125 in words is "one hundred twenty-one million, five hundred one thousand, one hundred twenty-five".