20122021022021 has 8 divisors (see below), whose sum is σ = 21311376769944. Its totient is φ = 18933299435520.

The previous prime is 20122021021957. The next prime is 20122021022069. The reversal of 20122021022021 is 12022012022102.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3445333657921 + 16676687364100 = 1856161^2 + 4083710^2 .

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 20122021022021 - 2⁶ = 20122021021957 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20122021012021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 158475020 + ... + 158601941.

It is an arithmetic number, because the mean of its divisors is an integer number (2663922096243).

Almost surely, 2^{20122021022021} is an apocalyptic number.

It is an amenable number.

20122021022021 is a deficient number, since it is larger than the sum of its proper divisors (1189355747923).

20122021022021 is a wasteful number, since it uses less digits than its factorization.

20122021022021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317080711.

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

Adding to 20122021022021 its reverse (12022012022102), we get a palindrome (32144033044123).

The spelling of 20122021022021 in words is "twenty trillion, one hundred twenty-two billion, twenty-one million, twenty-two thousand, twenty-one".