121525140406 has 8 divisors (see below), whose sum is σ = 183013957224. Its totient is φ = 60520488000.

The previous prime is 121525140383. The next prime is 121525140409. The reversal of 121525140406 is 604041525121.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121525140409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121040475 + ... + 121041478.

It is an arithmetic number, because the mean of its divisors is an integer number (22876744653).

Almost surely, 2^121525140406 is an apocalyptic number.

121525140406 is a deficient number, since it is larger than the sum of its proper divisors (61488816818).

121525140406 is a wasteful number, since it uses less digits than its factorization.

121525140406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242082206.

The product of its (nonzero) digits is 9600, while the sum is 31.

Adding to 121525140406 its reverse (604041525121), we get a palindrome (725566665527).

The spelling of 121525140406 in words is "one hundred twenty-one billion, five hundred twenty-five million, one hundred forty thousand, four hundred six".