2021221022122 has 4 divisors (see below), whose sum is σ = 3031831533186. Its totient is φ = 1010610511060.

The previous prime is 2021221022071. The next prime is 2021221022129. The reversal of 2021221022122 is 2212201221202.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1475571402361 + 545649619761 = 1214731^2 + 738681^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2021221022122.

It is not an unprimeable number, because it can be changed into a prime (2021221022129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505305255529 + ... + 505305255532.

Almost surely, 2^{2021221022122} is an apocalyptic number.

2021221022122 is a deficient number, since it is larger than the sum of its proper divisors (1010610511064).

2021221022122 is a wasteful number, since it uses less digits than its factorization.

2021221022122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1010610511063.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 2021221022122 its reverse (2212201221202), we get a palindrome (4233422243324).

The spelling of 2021221022122 in words is "two trillion, twenty-one billion, two hundred twenty-one million, twenty-two thousand, one hundred twenty-two".