1020202220021 has 16 divisors (see below), whose sum is σ = 1043353014144. Its totient is φ = 997322367744.

The previous prime is 1020202219999. The next prime is 1020202220039. The reversal of 1020202220021 is 1200222020201.

It is not a de Polignac number, because 1020202220021 - 2²⁶ = 1020135111157 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 = 1020202219978 and 1020202220005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020202420021) 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 15 ways as a sum of consecutive naturals, for example, 6351320 + ... + 6509966.

It is an arithmetic number, because the mean of its divisors is an integer number (65209563384).

Almost surely, 2^{1020202220021} is an apocalyptic number.

It is an amenable number.

1020202220021 is a deficient number, since it is larger than the sum of its proper divisors (23150794123).

1020202220021 is a wasteful number, since it uses less digits than its factorization.

1020202220021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159500.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 1020202220021 its reverse (1200222020201), we get a palindrome (2220424240222).

The spelling of 1020202220021 in words is "one trillion, twenty billion, two hundred two million, two hundred twenty thousand, twenty-one".