121511235224545 has 16 divisors (see below), whose sum is σ = 145935335992320. Its totient is φ = 97127758762624.

The previous prime is 121511235224539. The next prime is 121511235224569. The reversal of 121511235224545 is 545422532115121.

It is a cyclic number.

It is not a de Polignac number, because 121511235224545 - 2⁷ = 121511235224417 is a prime.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 156692352 + ... + 157465918.

It is an arithmetic number, because the mean of its divisors is an integer number (9120958499520).

Almost surely, 2^{121511235224545} is an apocalyptic number.

It is an amenable number.

121511235224545 is a deficient number, since it is larger than the sum of its proper divisors (24424100767775).

121511235224545 is a wasteful number, since it uses less digits than its factorization.

121511235224545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 799784.

The product of its digits is 480000, while the sum is 43.

Adding to 121511235224545 its reverse (545422532115121), we get a palindrome (666933767339666).

The spelling of 121511235224545 in words is "one hundred twenty-one trillion, five hundred eleven billion, two hundred thirty-five million, two hundred twenty-four thousand, five hundred forty-five".