1010001200221 has 4 divisors (see below), whose sum is σ = 1087693600252. Its totient is φ = 932308800192.

The previous prime is 1010001200191. The next prime is 1010001200237. The reversal of 1010001200221 is 1220021000101.

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 237764487321 + 772236712900 = 487611^2 + 878770^2 .

It is a cyclic number.

It is not a de Polignac number, because 1010001200221 - 2³⁵ = 975641461853 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1010001200198 and 1010001200207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1010001200261) by changing a digit.

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, 38846199996 + ... + 38846200021.

It is an arithmetic number, because the mean of its divisors is an integer number (271923400063).

Almost surely, 2^{1010001200221} is an apocalyptic number.

It is an amenable number.

1010001200221 is a deficient number, since it is larger than the sum of its proper divisors (77692400031).

1010001200221 is an equidigital number, since it uses as much as digits as its factorization.

1010001200221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77692400030.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 1010001200221 its reverse (1220021000101), we get a palindrome (2230022200322).

The spelling of 1010001200221 in words is "one trillion, ten billion, one million, two hundred thousand, two hundred twenty-one".