2021202021101 has 4 divisors (see below), whose sum is σ = 2021522802204. Its totient is φ = 2020881240000.

The previous prime is 2021202021073. The next prime is 2021202021103. The reversal of 2021202021101 is 1011202021202.

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 914605322500 + 1106596698601 = 956350^2 + 1051949^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2021202021101 is a prime.

It is a super-2 number, since 2×2021202021101² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021202021103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 160381100 + ... + 160393701.

It is an arithmetic number, because the mean of its divisors is an integer number (505380700551).

Almost surely, 2^{2021202021101} is an apocalyptic number.

It is an amenable number.

2021202021101 is a deficient number, since it is larger than the sum of its proper divisors (320781103).

2021202021101 is an equidigital number, since it uses as much as digits as its factorization.

2021202021101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320781102.

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

Adding to 2021202021101 its reverse (1011202021202), we get a palindrome (3032404042303).

The spelling of 2021202021101 in words is "two trillion, twenty-one billion, two hundred two million, twenty-one thousand, one hundred one".