121003561445 has 24 divisors (see below), whose sum is σ = 160199750376. Its totient is φ = 87670472448.

The previous prime is 121003561417. The next prime is 121003561447. The reversal of 121003561445 is 544165300121.

It can be written as a sum of positive squares in 12 ways, for example, as 74910047809 + 46093513636 = 273697^2 + 214694^2 .

It is not a de Polignac number, because 121003561445 - 2¹⁰ = 121003560421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121003561447) 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, 1306154 + ... + 1395723.

It is an arithmetic number, because the mean of its divisors is an integer number (6674989599).

Almost surely, 2^121003561445 is an apocalyptic number.

It is an amenable number.

121003561445 is a deficient number, since it is larger than the sum of its proper divisors (39196188931).

121003561445 is a wasteful number, since it uses less digits than its factorization.

121003561445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2701961 (or 2701948 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 32.

Adding to 121003561445 its reverse (544165300121), we get a palindrome (665168861566).

The spelling of 121003561445 in words is "one hundred twenty-one billion, three million, five hundred sixty-one thousand, four hundred forty-five".