2021021220122 has 8 divisors (see below), whose sum is σ = 3032983024500. Its totient is φ = 1010026878624.

The previous prime is 2021021220107. The next prime is 2021021220161. The reversal of 2021021220122 is 2210221201202.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1510881014041 + 510140206081 = 1229179^2 + 714241^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 2021021220122.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 241860497 + ... + 241868852.

Almost surely, 2^{2021021220122} is an apocalyptic number.

2021021220122 is a deficient number, since it is larger than the sum of its proper divisors (1011961804378).

2021021220122 is a wasteful number, since it uses less digits than its factorization.

2021021220122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 483731440.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 2021021220122 its reverse (2210221201202), we get a palindrome (4231242421324).

The spelling of 2021021220122 in words is "two trillion, twenty-one billion, twenty-one million, two hundred twenty thousand, one hundred twenty-two".