121040025 has 12 divisors (see below), whose sum is σ = 200119632. Its totient is φ = 64554640.

The previous prime is 121040021. The next prime is 121040033. The reversal of 121040025 is 520040121.

It is not a de Polignac number, because 121040025 - 2² = 121040021 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a junction number, because it is equal to n+sod(n) for n = 121039986 and 121040013.

It is not an unprimeable number, because it can be changed into a prime (121040021) 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, 806859 + ... + 807008.

It is an arithmetic number, because the mean of its divisors is an integer number (16676636).

Almost surely, 2^121040025 is an apocalyptic number.

121040025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121040025 is a deficient number, since it is larger than the sum of its proper divisors (79079607).

121040025 is a wasteful number, since it uses less digits than its factorization.

121040025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1613880 (or 1613875 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 121040025 is about 11001.8191677558. The cubic root of 121040025 is about 494.6632747176.

Adding to 121040025 its reverse (520040121), we get a palindrome (641080146).

The spelling of 121040025 in words is "one hundred twenty-one million, forty thousand, twenty-five".