2021220012101 has 4 divisors (see below), whose sum is σ = 2021694369804. Its totient is φ = 2020745654400.

The previous prime is 2021220012073. The next prime is 2021220012131. The reversal of 2021220012101 is 1012100221202.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1895099143876 + 126120868225 = 1376626^2 + 355135^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2021220012101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021220012131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 237172460 + ... + 237180981.

It is an arithmetic number, because the mean of its divisors is an integer number (505423592451).

Almost surely, 2^{2021220012101} is an apocalyptic number.

It is an amenable number.

2021220012101 is a deficient number, since it is larger than the sum of its proper divisors (474357703).

2021220012101 is an equidigital number, since it uses as much as digits as its factorization.

2021220012101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 474357702.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 2021220012101 its reverse (1012100221202), we get a palindrome (3033320233303).

The spelling of 2021220012101 in words is "two trillion, twenty-one billion, two hundred twenty million, twelve thousand, one hundred one".