121565762025 has 24 divisors (see below), whose sum is σ = 205265088384. Its totient is φ = 63455601600.

The previous prime is 121565761997. The next prime is 121565762047. The reversal of 121565762025 is 520267565121.

It is not a de Polignac number, because 121565762025 - 2⁷ = 121565761897 is a prime.

It is a super-3 number, since 3×121565762025³ (a number of 34 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17239846 + ... + 17246895.

It is an arithmetic number, because the mean of its divisors is an integer number (8552712016).

Almost surely, 2^121565762025 is an apocalyptic number.

121565762025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121565762025 is a deficient number, since it is larger than the sum of its proper divisors (83699326359).

121565762025 is a wasteful number, since it uses less digits than its factorization.

121565762025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34486801 (or 34486796 counting only the distinct ones).

The product of its (nonzero) digits is 252000, while the sum is 42.

The spelling of 121565762025 in words is "one hundred twenty-one billion, five hundred sixty-five million, seven hundred sixty-two thousand, twenty-five".