20012122210021 has 8 divisors (see below), whose sum is σ = 21197156716800. Its totient is φ = 18827960019648.

The previous prime is 20012122209983. The next prime is 20012122210027. The reversal of 20012122210021 is 12001222121002.

It is a happy number.

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 20012122210021 - 2¹⁵ = 20012122177253 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20012122209977 and 20012122210004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20012122210027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 218031861 + ... + 218123626.

It is an arithmetic number, because the mean of its divisors is an integer number (2649644589600).

Almost surely, 2^{20012122210021} is an apocalyptic number.

It is an amenable number.

20012122210021 is a deficient number, since it is larger than the sum of its proper divisors (1185034506779).

20012122210021 is a wasteful number, since it uses less digits than its factorization.

20012122210021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 436158203.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 20012122210021 its reverse (12001222121002), we get a palindrome (32013344331023).

The spelling of 20012122210021 in words is "twenty trillion, twelve billion, one hundred twenty-two million, two hundred ten thousand, twenty-one".