121500025 has 12 divisors (see below), whose sum is σ = 152569600. Its totient is φ = 95968080.

The previous prime is 121500023. The next prime is 121500031. The reversal of 121500025 is 520005121.

It is not a de Polignac number, because 121500025 - 2¹ = 121500023 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121499981 and 121500008.

It is not an unprimeable number, because it can be changed into a prime (121500023) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28785 + ... + 32734.

Almost surely, 2^121500025 is an apocalyptic number.

It is an amenable number.

121500025 is a deficient number, since it is larger than the sum of its proper divisors (31069575).

121500025 is an equidigital number, since it uses as much as digits as its factorization.

121500025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61608 (or 61603 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 121500025 is about 11022.7049765473. The cubic root of 121500025 is about 495.2891213046.

Adding to 121500025 its reverse (520005121), we get a palindrome (641505146).

The spelling of 121500025 in words is "one hundred twenty-one million, five hundred thousand, twenty-five".