121044213145 has 4 divisors (see below), whose sum is σ = 145253055780. Its totient is φ = 96835370512.

The previous prime is 121044213119. The next prime is 121044213181. The reversal of 121044213145 is 541312440121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 541312440121 = 2473 ⋅218888977.

It can be written as a sum of positive squares in 2 ways, for example, as 75622800016 + 45421413129 = 274996^2 + 213123^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121044213145 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 3 ways as a sum of consecutive naturals, for example, 12104421310 + ... + 12104421319.

It is an arithmetic number, because the mean of its divisors is an integer number (36313263945).

Almost surely, 2^121044213145 is an apocalyptic number.

It is an amenable number.

121044213145 is a deficient number, since it is larger than the sum of its proper divisors (24208842635).

121044213145 is an equidigital number, since it uses as much as digits as its factorization.

121044213145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24208842634.

The product of its (nonzero) digits is 3840, while the sum is 28.

Adding to 121044213145 its reverse (541312440121), we get a palindrome (662356653266).

The spelling of 121044213145 in words is "one hundred twenty-one billion, forty-four million, two hundred thirteen thousand, one hundred forty-five".