121530533151 has 16 divisors (see below), whose sum is σ = 162706231296. Its totient is φ = 80688228096.

The previous prime is 121530533119. The next prime is 121530533171. The reversal of 121530533151 is 151335035121.

It is not a de Polignac number, because 121530533151 - 2⁵ = 121530533119 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121530533101) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 694696 + ... + 851858.

It is an arithmetic number, because the mean of its divisors is an integer number (10169139456).

Almost surely, 2^121530533151 is an apocalyptic number.

121530533151 is a deficient number, since it is larger than the sum of its proper divisors (41175698145).

121530533151 is a wasteful number, since it uses less digits than its factorization.

121530533151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158222.

The product of its (nonzero) digits is 6750, while the sum is 30.

Adding to 121530533151 its reverse (151335035121), we get a palindrome (272865568272).

The spelling of 121530533151 in words is "one hundred twenty-one billion, five hundred thirty million, five hundred thirty-three thousand, one hundred fifty-one".