20002012221 has 16 divisors (see below), whose sum is σ = 27191738880. Its totient is φ = 13073835840.

The previous prime is 20002012189. The next prime is 20002012243. The reversal of 20002012221 is 12221020002.

It is not a de Polignac number, because 20002012221 - 2⁵ = 20002012189 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20002012197 and 20002012206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20002012621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 185091 + ... + 272511.

It is an arithmetic number, because the mean of its divisors is an integer number (1699483680).

Almost surely, 2^20002012221 is an apocalyptic number.

It is an amenable number.

20002012221 is a deficient number, since it is larger than the sum of its proper divisors (7189726659).

20002012221 is a wasteful number, since it uses less digits than its factorization.

20002012221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88916.

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 20002012221 its reverse (12221020002), we get a palindrome (32223032223).

The spelling of 20002012221 in words is "twenty billion, two million, twelve thousand, two hundred twenty-one".