1020221100001 has 4 divisors (see below), whose sum is σ = 1039470554772. Its totient is φ = 1000971645232.

The previous prime is 1020221099971. The next prime is 1020221100023. The reversal of 1020221100001 is 1000011220201.

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 413193125601 + 607027974400 = 642801^2 + 779120^2 .

It is a cyclic number.

It is not a de Polignac number, because 1020221100001 - 2¹¹ = 1020221097953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1020221100061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9624727306 + ... + 9624727411.

It is an arithmetic number, because the mean of its divisors is an integer number (259867638693).

Almost surely, 2^{1020221100001} is an apocalyptic number.

It is an amenable number.

1020221100001 is a deficient number, since it is larger than the sum of its proper divisors (19249454771).

1020221100001 is an equidigital number, since it uses as much as digits as its factorization.

1020221100001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19249454770.

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

Adding to 1020221100001 its reverse (1000011220201), we get a palindrome (2020232320202).

The spelling of 1020221100001 in words is "one trillion, twenty billion, two hundred twenty-one million, one hundred thousand, one".