100054542255221 has 4 divisors (see below), whose sum is σ = 100426492226700. Its totient is φ = 99682592283744.

The previous prime is 100054542255209. The next prime is 100054542255253. The reversal of 100054542255221 is 122552245450001.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 31973709520900 + 68080832734321 = 5654530^2 + 8251111^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100054542255221 is a prime.

It is a super-2 number, since 2×100054542255221² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100054542225221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 185974985336 + ... + 185974985873.

It is an arithmetic number, because the mean of its divisors is an integer number (25106623056675).

Almost surely, 2^{100054542255221} is an apocalyptic number.

It is an amenable number.

100054542255221 is a deficient number, since it is larger than the sum of its proper divisors (371949971479).

100054542255221 is an equidigital number, since it uses as much as digits as its factorization.

100054542255221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 371949971478.

The product of its (nonzero) digits is 160000, while the sum is 38.

The spelling of 100054542255221 in words is "one hundred trillion, fifty-four billion, five hundred forty-two million, two hundred fifty-five thousand, two hundred twenty-one".