20200011122021 has 4 divisors (see below), whose sum is σ = 20200046078892. Its totient is φ = 20199976165152.

The previous prime is 20200011122003. The next prime is 20200011122023. The reversal of 20200011122021 is 12022111000202.

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 17812324816225 + 2387686305796 = 4220465^2 + 1545214^2 .

It is a cyclic number.

It is not a de Polignac number, because 20200011122021 - 2¹⁰ = 20200011120997 is a prime.

It is a super-2 number, since 2×20200011122021² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20200011121987 and 20200011122005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20200011122023) 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, 16596830 + ... + 17772303.

It is an arithmetic number, because the mean of its divisors is an integer number (5050011519723).

Almost surely, 2^{20200011122021} is an apocalyptic number.

It is an amenable number.

20200011122021 is a deficient number, since it is larger than the sum of its proper divisors (34956871).

20200011122021 is an equidigital number, since it uses as much as digits as its factorization.

20200011122021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34956870.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 20200011122021 its reverse (12022111000202), we get a palindrome (32222122122223).

The spelling of 20200011122021 in words is "twenty trillion, two hundred billion, eleven million, one hundred twenty-two thousand, twenty-one".