121145520125 has 32 divisors (see below), whose sum is σ = 172896871680. Its totient is φ = 83018932800.

The previous prime is 121145520107. The next prime is 121145520131. The reversal of 121145520125 is 521025541121.

It is not a de Polignac number, because 121145520125 - 2¹⁴ = 121145503741 is a prime.

It is a super-3 number, since 3×121145520125³ (a number of 34 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1373867 + ... + 1459383.

It is an arithmetic number, because the mean of its divisors is an integer number (5403027240).

Almost surely, 2^121145520125 is an apocalyptic number.

It is an amenable number.

121145520125 is a deficient number, since it is larger than the sum of its proper divisors (51751351555).

121145520125 is an equidigital number, since it uses as much as digits as its factorization.

121145520125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87158 (or 87148 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 29.

The spelling of 121145520125 in words is "one hundred twenty-one billion, one hundred forty-five million, five hundred twenty thousand, one hundred twenty-five".