1020001120221 has 4 divisors (see below), whose sum is σ = 1360001493632. Its totient is φ = 680000746812.

The previous prime is 1020001120207. The next prime is 1020001120241. The reversal of 1020001120221 is 1220211000201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1020001120221 - 2⁶ = 1020001120157 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1020001120197 and 1020001120206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020001120241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 170000186701 + ... + 170000186706.

It is an arithmetic number, because the mean of its divisors is an integer number (340000373408).

Almost surely, 2^{1020001120221} is an apocalyptic number.

It is an amenable number.

1020001120221 is a deficient number, since it is larger than the sum of its proper divisors (340000373411).

1020001120221 is an equidigital number, since it uses as much as digits as its factorization.

1020001120221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340000373410.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 1020001120221 its reverse (1220211000201), we get a palindrome (2240212120422).

It can be divided in two parts, 102000 and 1120221, that added together give a palindrome (1222221).

The spelling of 1020001120221 in words is "one trillion, twenty billion, one million, one hundred twenty thousand, two hundred twenty-one".