121771225 has 9 divisors (see below), whose sum is σ = 151064767. Its totient is φ = 97372840.

The previous prime is 121771213. The next prime is 121771229. The reversal of 121771225 is 522177121.

The square root of 121771225 is 11035.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 43837641 + 77933584 = 6621^2 + 8828^2 .

It is not a de Polignac number, because 121771225 - 2²¹ = 119674073 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121771193 and 121771202.

It is not an unprimeable number, because it can be changed into a prime (121771229) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 54072 + ... + 56278.

Almost surely, 2^121771225 is an apocalyptic number.

121771225 is the 11035-th square number.

121771225 is the 5518-th centered octagonal number.

It is an amenable number.

121771225 is a deficient number, since it is larger than the sum of its proper divisors (29293542).

121771225 is an frugal number, since it uses more digits than its factorization.

121771225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4424 (or 2212 counting only the distinct ones).

The product of its digits is 1960, while the sum is 28.

The cubic root of 121771225 is about 495.6573587959.

The spelling of 121771225 in words is "one hundred twenty-one million, seven hundred seventy-one thousand, two hundred twenty-five".