121305511151 has 8 divisors (see below), whose sum is σ = 140117595984. Its totient is φ = 103790811520.

The previous prime is 121305511147. The next prime is 121305511183. The reversal of 121305511151 is 151115503121.

It is a happy number.

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

It is not a de Polignac number, because 121305511151 - 2² = 121305511147 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121305511151.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121305541151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 324346100 + ... + 324346473.

It is an arithmetic number, because the mean of its divisors is an integer number (17514699498).

Almost surely, 2^121305511151 is an apocalyptic number.

121305511151 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

121305511151 is a deficient number, since it is larger than the sum of its proper divisors (18812084833).

121305511151 is a wasteful number, since it uses less digits than its factorization.

121305511151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 648692601.

The product of its (nonzero) digits is 750, while the sum is 26.

The spelling of 121305511151 in words is "one hundred twenty-one billion, three hundred five million, five hundred eleven thousand, one hundred fifty-one".