121540045425 has 24 divisors (see below), whose sum is σ = 202824223776. Its totient is φ = 64215546240.

The previous prime is 121540045397. The next prime is 121540045559. The reversal of 121540045425 is 524540045121.

It is a happy number.

It is not a de Polignac number, because 121540045425 - 2⁸ = 121540045169 is a prime.

It is a super-2 number, since 2×121540045425² (a number of 23 digits) contains 22 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, 7564564 + ... + 7580613.

It is an arithmetic number, because the mean of its divisors is an integer number (8451009324).

Almost surely, 2^121540045425 is an apocalyptic number.

121540045425 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121540045425 is a deficient number, since it is larger than the sum of its proper divisors (81284178351).

121540045425 is a wasteful number, since it uses less digits than its factorization.

121540045425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15145297 (or 15145292 counting only the distinct ones).

The product of its (nonzero) digits is 32000, while the sum is 33.

The spelling of 121540045425 in words is "one hundred twenty-one billion, five hundred forty million, forty-five thousand, four hundred twenty-five".