20020200122021 has 4 divisors (see below), whose sum is σ = 21840218314944. Its totient is φ = 18200181929100.

The previous prime is 20020200122009. The next prime is 20020200122029. The reversal of 20020200122021 is 12022100202002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20020200122021 - 2³⁸ = 19745322215077 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20020200121987 and 20020200122005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20020200122029) 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, 910009096445 + ... + 910009096466.

It is an arithmetic number, because the mean of its divisors is an integer number (5460054578736).

Almost surely, 2^{20020200122021} is an apocalyptic number.

It is an amenable number.

20020200122021 is a deficient number, since it is larger than the sum of its proper divisors (1820018192923).

20020200122021 is a wasteful number, since it uses less digits than its factorization.

20020200122021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1820018192922.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 20020200122021 its reverse (12022100202002), we get a palindrome (32042300324023).

The spelling of 20020200122021 in words is "twenty trillion, twenty billion, two hundred million, one hundred twenty-two thousand, twenty-one".