2021222120101 has 8 divisors (see below), whose sum is σ = 2061375443064. Its totient is φ = 1981143503040.

The previous prime is 2021222120089. The next prime is 2021222120111. The reversal of 2021222120101 is 1010212221202.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1139737732225 + 881484387876 = 1067585^2 + 938874^2 .

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 2021222120101 - 2¹⁷ = 2021221989029 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 (2021222120111) 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, 18621826 + ... + 18730051.

It is an arithmetic number, because the mean of its divisors is an integer number (257671930383).

Almost surely, 2^{2021222120101} is an apocalyptic number.

It is an amenable number.

2021222120101 is a deficient number, since it is larger than the sum of its proper divisors (40153322963).

2021222120101 is a wasteful number, since it uses less digits than its factorization.

2021222120101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37352951.

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

Adding to 2021222120101 its reverse (1010212221202), we get a palindrome (3031434341303).

The spelling of 2021222120101 in words is "two trillion, twenty-one billion, two hundred twenty-two million, one hundred twenty thousand, one hundred one".