121751225 has 12 divisors (see below), whose sum is σ = 153041916. Its totient is φ = 96065280.

The previous prime is 121751209. The next prime is 121751233. The reversal of 121751225 is 522157121.

It can be written as a sum of positive squares in 6 ways, for example, as 817216 + 120934009 = 904^2 + 10997^2 .

It is not a de Polignac number, because 121751225 - 2⁴ = 121751209 is a prime.

It is a super-3 number, since 3×121751225³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 121751194 and 121751203.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31532 + ... + 35181.

It is an arithmetic number, because the mean of its divisors is an integer number (12753493).

Almost surely, 2^121751225 is an apocalyptic number.

It is an amenable number.

121751225 is a deficient number, since it is larger than the sum of its proper divisors (31290691).

121751225 is an equidigital number, since it uses as much as digits as its factorization.

121751225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66796 (or 66791 counting only the distinct ones).

The product of its digits is 1400, while the sum is 26.

The square root of 121751225 is about 11034.0937552660. The cubic root of 121751225 is about 495.6302213230.

The spelling of 121751225 in words is "one hundred twenty-one million, seven hundred fifty-one thousand, two hundred twenty-five".