2021021022122 has 4 divisors (see below), whose sum is σ = 3031531533186. Its totient is φ = 1010510511060.

The previous prime is 2021021022091. The next prime is 2021021022133. The reversal of 2021021022122 is 2212201201202.

It is a happy number.

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., 1194520029481 + 826500992641 = 1092941^2 + 909121^2 .

It is a super-2 number, since 2×2021021022122² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2021021022122.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505255255529 + ... + 505255255532.

Almost surely, 2^{2021021022122} is an apocalyptic number.

2021021022122 is a deficient number, since it is larger than the sum of its proper divisors (1010510511064).

2021021022122 is a wasteful number, since it uses less digits than its factorization.

2021021022122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1010510511063.

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

Adding to 2021021022122 its reverse (2212201201202), we get a palindrome (4233222223324).

The spelling of 2021021022122 in words is "two trillion, twenty-one billion, twenty-one million, twenty-two thousand, one hundred twenty-two".