20012202022021 has 4 divisors (see below), whose sum is σ = 21831493114944. Its totient is φ = 18192910929100.

The previous prime is 20012202022013. The next prime is 20012202022031. The reversal of 20012202022021 is 12022020221002.

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 20012202022021 - 2³ = 20012202022013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20012202021986 and 20012202022004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20012202022031) 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 3 ways as a sum of consecutive naturals, for example, 909645546445 + ... + 909645546466.

It is an arithmetic number, because the mean of its divisors is an integer number (5457873278736).

Almost surely, 2^{20012202022021} is an apocalyptic number.

It is an amenable number.

20012202022021 is a deficient number, since it is larger than the sum of its proper divisors (1819291092923).

20012202022021 is a wasteful number, since it uses less digits than its factorization.

20012202022021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1819291092922.

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

Adding to 20012202022021 its reverse (12022020221002), we get a palindrome (32034222243023).

The spelling of 20012202022021 in words is "twenty trillion, twelve billion, two hundred two million, twenty-two thousand, twenty-one".