20020022122021 has 4 divisors (see below), whose sum is σ = 20020052819500. Its totient is φ = 20019991424544.

The previous prime is 20020022122007. The next prime is 20020022122027. The reversal of 20020022122021 is 12022122002002.

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

It can be written as a sum of positive squares in 2 ways, for example, as 10223935905121 + 9796086216900 = 3197489^2 + 3129870^2 .

It is a cyclic number.

It is not a de Polignac number, because 20020022122021 - 2⁷ = 20020022121893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20020022121986 and 20020022122004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20020022122027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14348766 + ... + 15682063.

It is an arithmetic number, because the mean of its divisors is an integer number (5005013204875).

Almost surely, 2^{20020022122021} is an apocalyptic number.

It is an amenable number.

20020022122021 is a deficient number, since it is larger than the sum of its proper divisors (30697479).

20020022122021 is an equidigital number, since it uses as much as digits as its factorization.

20020022122021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30697478.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 20020022122021 its reverse (12022122002002), we get a palindrome (32042144124023).

The spelling of 20020022122021 in words is "twenty trillion, twenty billion, twenty-two million, one hundred twenty-two thousand, twenty-one".