20000012202221 has 16 divisors (see below), whose sum is σ = 21334761538560. Its totient is φ = 18683112564480.

The previous prime is 20000012202151. The next prime is 20000012202227. The reversal of 20000012202221 is 12220221000002.

It is not a de Polignac number, because 20000012202221 - 2²⁶ = 19999945093357 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20000012202196 and 20000012202205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20000012202227) 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, 1681301 + ... + 6544218.

It is an arithmetic number, because the mean of its divisors is an integer number (1333422596160).

Almost surely, 2^{20000012202221} is an apocalyptic number.

It is an amenable number.

20000012202221 is a deficient number, since it is larger than the sum of its proper divisors (1334749336339).

20000012202221 is a wasteful number, since it uses less digits than its factorization.

20000012202221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8226604.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 20000012202221 its reverse (12220221000002), we get a palindrome (32220233202223).

The spelling of 20000012202221 in words is "twenty trillion, twelve million, two hundred two thousand, two hundred twenty-one".