20000012032221 has 64 divisors (see below), whose sum is σ = 30461921538048. Its totient is φ = 11562911382528.

The previous prime is 20000012032139. The next prime is 20000012032243. The reversal of 20000012032221 is 12223021000002.

It is a happy number.

It is not a de Polignac number, because 20000012032221 - 2¹⁸ = 20000011770077 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20000012032221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20000012032621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 945035586 + ... + 945056748.

It is an arithmetic number, because the mean of its divisors is an integer number (475967524032).

Almost surely, 2^{20000012032221} is an apocalyptic number.

It is an amenable number.

20000012032221 is a deficient number, since it is larger than the sum of its proper divisors (10461909505827).

20000012032221 is a wasteful number, since it uses less digits than its factorization.

20000012032221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23690.

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 20000012032221 its reverse (12223021000002), we get a palindrome (32223033032223).

The spelling of 20000012032221 in words is "twenty trillion, twelve million, thirty-two thousand, two hundred twenty-one".