121355555411 has 8 divisors (see below), whose sum is σ = 128948165424. Its totient is φ = 113813395200.

The previous prime is 121355555389. The next prime is 121355555413. The reversal of 121355555411 is 114555553121.

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

It is not a de Polignac number, because 121355555411 - 2¹⁰ = 121355554387 is a prime.

It is a super-2 number, since 2×121355555411² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121355555413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12607490 + ... + 12617111.

It is an arithmetic number, because the mean of its divisors is an integer number (16118520678).

Almost surely, 2^121355555411 is an apocalyptic number.

121355555411 is a deficient number, since it is larger than the sum of its proper divisors (7592610013).

121355555411 is a wasteful number, since it uses less digits than its factorization.

121355555411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25224901.

The product of its digits is 75000, while the sum is 38.

The spelling of 121355555411 in words is "one hundred twenty-one billion, three hundred fifty-five million, five hundred fifty-five thousand, four hundred eleven".