1001201102221 has 4 divisors (see below), whose sum is σ = 1001484491292. Its totient is φ = 1000917713152.

The previous prime is 1001201102183. The next prime is 1001201102233. The reversal of 1001201102221 is 1222011021001.

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 318406275625 + 682794826596 = 564275^2 + 826314^2 .

It is a cyclic number.

It is not a de Polignac number, because 1001201102221 - 2¹⁹ = 1001200577933 is a prime.

It is a super-2 number, since 2×1001201102221² (a number of 25 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 (1001201102021) 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, 141689236 + ... + 141696301.

It is an arithmetic number, because the mean of its divisors is an integer number (250371122823).

Almost surely, 2^{1001201102221} is an apocalyptic number.

It is an amenable number.

1001201102221 is a deficient number, since it is larger than the sum of its proper divisors (283389071).

1001201102221 is an equidigital number, since it uses as much as digits as its factorization.

1001201102221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283389070.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1001201102221 its reverse (1222011021001), we get a palindrome (2223212123222).

The spelling of 1001201102221 in words is "one trillion, one billion, two hundred one million, one hundred two thousand, two hundred twenty-one".