121421545124121 has 36 divisors (see below), whose sum is σ = 197990677298596. Its totient is φ = 71599928304960.

The previous prime is 121421545124119. The next prime is 121421545124183.

121421545124121 is a `hidden beast` number, since 1 + 2 + 1 + 4 + 2 + 15 + 4 + 512 + 4 + 121 = 666.

121421545124121 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 2 ways, for example, as 57074836834521 + 64346708289600 = 7554789^2 + 8021640^2 .

It is not a de Polignac number, because 121421545124121 - 2¹ = 121421545124119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121421545124021) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1506692206 + ... + 1506772791.

Almost surely, 2^{121421545124121} is an apocalyptic number.

121421545124121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121421545124121 is a deficient number, since it is larger than the sum of its proper divisors (76569132174475).

121421545124121 is a wasteful number, since it uses less digits than its factorization.

121421545124121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3013465062 (or 3013465048 counting only the distinct ones).

The product of its digits is 25600, while the sum is 36.

The spelling of 121421545124121 in words is "one hundred twenty-one trillion, four hundred twenty-one billion, five hundred forty-five million, one hundred twenty-four thousand, one hundred twenty-one".