2021212022101 has 8 divisors (see below), whose sum is σ = 2023256648408. Its totient is φ = 2019168000000.

The previous prime is 2021212022083. The next prime is 2021212022111. The reversal of 2021212022101 is 1012202121202.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 65395787076 + 1955816235025 = 255726^2 + 1398505^2 .

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 2021212022101 - 2⁹ = 2021212021589 is a prime.

It is a super-2 number, since 2×2021212022101² (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 (2021212022111) 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, 6699301 + ... + 6994501.

It is an arithmetic number, because the mean of its divisors is an integer number (252907081051).

Almost surely, 2^{2021212022101} is an apocalyptic number.

It is an amenable number.

2021212022101 is a deficient number, since it is larger than the sum of its proper divisors (2044626307).

2021212022101 is a wasteful number, since it uses less digits than its factorization.

2021212022101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302103.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 2021212022101 its reverse (1012202121202), we get a palindrome (3033414143303).

It can be divided in two parts, 202121 and 2022101, that added together give a palindrome (2224222).

The spelling of 2021212022101 in words is "two trillion, twenty-one billion, two hundred twelve million, twenty-two thousand, one hundred one".