2021220110101 has 8 divisors (see below), whose sum is σ = 2021919349464. Its totient is φ = 2020520970240.

The previous prime is 2021220110027. The next prime is 2021220110159. The reversal of 2021220110101 is 1010110221202.

It can be written as a sum of positive squares in 4 ways, for example, as 40712747076 + 1980507363025 = 201774^2 + 1407305^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 2021220110101 - 2⁹ = 2021220109589 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 (2021220110801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80446821 + ... + 80471941.

It is an arithmetic number, because the mean of its divisors is an integer number (252739918683).

Almost surely, 2^{2021220110101} is an apocalyptic number.

It is an amenable number.

2021220110101 is a deficient number, since it is larger than the sum of its proper divisors (699239363).

2021220110101 is a wasteful number, since it uses less digits than its factorization.

2021220110101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49751.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 2021220110101 its reverse (1010110221202), we get a palindrome (3031330331303).

The spelling of 2021220110101 in words is "two trillion, twenty-one billion, two hundred twenty million, one hundred ten thousand, one hundred one".