121264552555 has 8 divisors (see below), whose sum is σ = 150535306800. Its totient is φ = 93666412896.

The previous prime is 121264552553. The next prime is 121264552601. The reversal of 121264552555 is 555255462121.

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

It is a cyclic number.

It is not a de Polignac number, because 121264552555 - 2¹ = 121264552553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121264552553) 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 7 ways as a sum of consecutive naturals, for example, 418153485 + ... + 418153774.

It is an arithmetic number, because the mean of its divisors is an integer number (18816913350).

Almost surely, 2^121264552555 is an apocalyptic number.

121264552555 is a deficient number, since it is larger than the sum of its proper divisors (29270754245).

121264552555 is an equidigital number, since it uses as much as digits as its factorization.

121264552555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 836307293.

The product of its digits is 600000, while the sum is 43.

The spelling of 121264552555 in words is "one hundred twenty-one billion, two hundred sixty-four million, five hundred fifty-two thousand, five hundred fifty-five".