121255304011 has 4 divisors (see below), whose sum is σ = 121419385000. Its totient is φ = 121091223024.

The previous prime is 121255303987. The next prime is 121255304017. The reversal of 121255304011 is 110403552121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 110403552121 = 207013 ⋅533317.

It is a cyclic number.

It is not a de Polignac number, because 121255304011 - 2¹⁵ = 121255271243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121255304017) 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 3 ways as a sum of consecutive naturals, for example, 82039386 + ... + 82040863.

It is an arithmetic number, because the mean of its divisors is an integer number (30354846250).

Almost surely, 2^121255304011 is an apocalyptic number.

121255304011 is a deficient number, since it is larger than the sum of its proper divisors (164080989).

121255304011 is an equidigital number, since it uses as much as digits as its factorization.

121255304011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164080988.

The product of its (nonzero) digits is 1200, while the sum is 25.

Adding to 121255304011 its reverse (110403552121), we get a palindrome (231658856132).

The spelling of 121255304011 in words is "one hundred twenty-one billion, two hundred fifty-five million, three hundred four thousand, eleven".