220021101021 has 16 divisors (see below), whose sum is σ = 306145422720. Its totient is φ = 140289969600.

The previous prime is 220021101017. The next prime is 220021101061. The reversal of 220021101021 is 120101120022.

It is not a de Polignac number, because 220021101021 - 2² = 220021101017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 220021100988 and 220021101006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220021101061) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 606571 + ... + 898871.

It is an arithmetic number, because the mean of its divisors is an integer number (19134088920).

Almost surely, 2^220021101021 is an apocalyptic number.

It is an amenable number.

220021101021 is a deficient number, since it is larger than the sum of its proper divisors (86124321699).

220021101021 is a wasteful number, since it uses less digits than its factorization.

220021101021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303236.

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

Adding to 220021101021 its reverse (120101120022), we get a palindrome (340122221043).

The spelling of 220021101021 in words is "two hundred twenty billion, twenty-one million, one hundred one thousand, twenty-one".