20021001221022 has 16 divisors (see below), whose sum is σ = 40042056592272. Its totient is φ = 6673658048640.

The previous prime is 20021001220949. The next prime is 20021001221041. The reversal of 20021001221022 is 22012210012002.

It is a junction number, because it is equal to n+sod(n) for n = 20021001220992 and 20021001221010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3801228 + ... + 7381824.

It is an arithmetic number, because the mean of its divisors is an integer number (2502628537017).

Almost surely, 2^{20021001221022} is an apocalyptic number.

20021001221022 is an abundant number, since it is smaller than the sum of its proper divisors (20021055371250).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20021001221022 is a wasteful number, since it uses less digits than its factorization.

20021001221022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4512523.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 20021001221022 its reverse (22012210012002), we get a palindrome (42033211233024).

The spelling of 20021001221022 in words is "twenty trillion, twenty-one billion, one million, two hundred twenty-one thousand, twenty-two".