220121454052449 has 32 divisors (see below), whose sum is σ = 344896193062400. Its totient is φ = 138365194297680.

The previous prime is 220121454052433. The next prime is 220121454052471. The reversal of 220121454052449 is 944250454121022.

220121454052449 is a `hidden beast` number, since 2 + 2 + 0 + 1 + 2 + 1 + 45 + 40 + 524 + 49 = 666.

It is not a de Polignac number, because 220121454052449 - 2⁴ = 220121454052433 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (220121452052449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1016684779 + ... + 1016901264.

It is an arithmetic number, because the mean of its divisors is an integer number (10778006033200).

Almost surely, 2^{220121454052449} is an apocalyptic number.

It is an amenable number.

220121454052449 is a deficient number, since it is larger than the sum of its proper divisors (124774739009951).

220121454052449 is a wasteful number, since it uses less digits than its factorization.

220121454052449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2033586282 (or 2033586276 counting only the distinct ones).

The product of its (nonzero) digits is 921600, while the sum is 45.

The spelling of 220121454052449 in words is "two hundred twenty trillion, one hundred twenty-one billion, four hundred fifty-four million, fifty-two thousand, four hundred forty-nine".