20012221020211 has 16 divisors (see below), whose sum is σ = 23609463920640. Its totient is φ = 16599593687040.

The previous prime is 20012221020179. The next prime is 20012221020221. The reversal of 20012221020211 is 11202012221002.

It is a happy number.

It is not a de Polignac number, because 20012221020211 - 2⁵ = 20012221020179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20012221020221) 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, 7950180 + ... + 10160206.

It is an arithmetic number, because the mean of its divisors is an integer number (1475591495040).

Almost surely, 2^{20012221020211} is an apocalyptic number.

20012221020211 is a deficient number, since it is larger than the sum of its proper divisors (3597242900429).

20012221020211 is a wasteful number, since it uses less digits than its factorization.

20012221020211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2251794.

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

Adding to 20012221020211 its reverse (11202012221002), we get a palindrome (31214233241213).

The spelling of 20012221020211 in words is "twenty trillion, twelve billion, two hundred twenty-one million, twenty thousand, two hundred eleven".