1020020021211 has 4 divisors (see below), whose sum is σ = 1360026694952. Its totient is φ = 680013347472.

The previous prime is 1020020021203. The next prime is 1020020021213. The reversal of 1020020021211 is 1121200200201.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1020020021211 - 2³ = 1020020021203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1020020021213) 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, 170003336866 + ... + 170003336871.

It is an arithmetic number, because the mean of its divisors is an integer number (340006673738).

Almost surely, 2^{1020020021211} is an apocalyptic number.

1020020021211 is a deficient number, since it is larger than the sum of its proper divisors (340006673741).

1020020021211 is an equidigital number, since it uses as much as digits as its factorization.

1020020021211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340006673740.

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

Adding to 1020020021211 its reverse (1121200200201), we get a palindrome (2141220221412).

The spelling of 1020020021211 in words is "one trillion, twenty billion, twenty million, twenty-one thousand, two hundred eleven".