121623075025 has 27 divisors (see below), whose sum is σ = 159211252443. Its totient is φ = 92152378800.

The previous prime is 121623075023. The next prime is 121623075029. The reversal of 121623075025 is 520570326121.

The square root of 121623075025 is 348745.

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., 43784307009 + 77838768016 = 209247^2 + 278996^2 .

It is not a de Polignac number, because 121623075025 - 2¹ = 121623075023 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121623075023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 33128940 + ... + 33132610.

Almost surely, 2^121623075025 is an apocalyptic number.

121623075025 is the 348745-th square number.

121623075025 is the 174373-rd centered octagonal number.

It is an amenable number.

121623075025 is a deficient number, since it is larger than the sum of its proper divisors (37588177418).

121623075025 is an frugal number, since it uses more digits than its factorization.

121623075025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7390 (or 3695 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 34.

The spelling of 121623075025 in words is "one hundred twenty-one billion, six hundred twenty-three million, seventy-five thousand, twenty-five".