121525443330531 has 16 divisors (see below), whose sum is σ = 167755505700000. Its totient is φ = 78160645075968.

The previous prime is 121525443330491. The next prime is 121525443330547. The reversal of 121525443330531 is 135033344525121.

It is a de Polignac number, because none of the positive numbers 2^k-121525443330531 is a prime.

It is a super-3 number, since 3×121525443330531³ (a number of 43 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (121525443530531) 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 15 ways as a sum of consecutive naturals, for example, 559076356 + ... + 559293681.

It is an arithmetic number, because the mean of its divisors is an integer number (10484719106250).

Almost surely, 2^{121525443330531} is an apocalyptic number.

121525443330531 is a deficient number, since it is larger than the sum of its proper divisors (46230062369469).

121525443330531 is a wasteful number, since it uses less digits than its factorization.

121525443330531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1118371318.

The product of its (nonzero) digits is 648000, while the sum is 42.

Adding to 121525443330531 its reverse (135033344525121), we get a palindrome (256558787855652).

The spelling of 121525443330531 in words is "one hundred twenty-one trillion, five hundred twenty-five billion, four hundred forty-three million, three hundred thirty thousand, five hundred thirty-one".