121776571225 has 27 divisors (see below), whose sum is σ = 153315672319. Its totient is φ = 95951416400.

The previous prime is 121776571157. The next prime is 121776571243. The reversal of 121776571225 is 522175677121.

The square root of 121776571225 is 348965.

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., 43839565641 + 77937005584 = 209379^2 + 279172^2 .

It is not a de Polignac number, because 121776571225 - 2²⁹ = 121239700313 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 123882084 + ... + 123883066.

Almost surely, 2^121776571225 is an apocalyptic number.

121776571225 is the 348965-th square number.

121776571225 is the 174483-rd centered octagonal number.

It is an amenable number.

121776571225 is a deficient number, since it is larger than the sum of its proper divisors (31539101094).

121776571225 is an frugal number, since it uses more digits than its factorization.

121776571225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2118 (or 1059 counting only the distinct ones).

The product of its digits is 411600, while the sum is 46.

The spelling of 121776571225 in words is "one hundred twenty-one billion, seven hundred seventy-six million, five hundred seventy-one thousand, two hundred twenty-five".