121553541205011 has 24 divisors (see below), whose sum is σ = 184126046635440. Its totient is φ = 80125180705152.

The previous prime is 121553541205001. The next prime is 121553541205039. The reversal of 121553541205011 is 110502145355121.

121553541205011 is a `hidden beast` number, since 1 + 2 + 1 + 5 + 53 + 541 + 2 + 0 + 50 + 11 = 666.

It is not a de Polignac number, because 121553541205011 - 2¹³ = 121553541196819 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121553541205001) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2810204970 + ... + 2810248223.

It is an arithmetic number, because the mean of its divisors is an integer number (7671918609810).

Almost surely, 2^{121553541205011} is an apocalyptic number.

121553541205011 is a deficient number, since it is larger than the sum of its proper divisors (62572505430429).

121553541205011 is an frugal number, since it uses more digits than its factorization.

121553541205011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5620453297 (or 5620453285 counting only the distinct ones).

The product of its (nonzero) digits is 30000, while the sum is 36.

The spelling of 121553541205011 in words is "one hundred twenty-one trillion, five hundred fifty-three billion, five hundred forty-one million, two hundred five thousand, eleven".