1020021112221 has 8 divisors (see below), whose sum is σ = 1360033497984. Its totient is φ = 680011400640.

The previous prime is 1020021112183. The next prime is 1020021112261. The reversal of 1020021112221 is 1222111200201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1020021112221 - 2⁶ = 1020021112157 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1020021112221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020021112261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 526780 + ... + 1522346.

It is an arithmetic number, because the mean of its divisors is an integer number (170004187248).

Almost surely, 2^{1020021112221} is an apocalyptic number.

It is an amenable number.

1020021112221 is a deficient number, since it is larger than the sum of its proper divisors (340012385763).

1020021112221 is an equidigital number, since it uses as much as digits as its factorization.

1020021112221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1337091.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 1020021112221 its reverse (1222111200201), we get a palindrome (2242132312422).

The spelling of 1020021112221 in words is "one trillion, twenty billion, twenty-one million, one hundred twelve thousand, two hundred twenty-one".