20012220221211 has 24 divisors (see below), whose sum is σ = 30194031718656. Its totient is φ = 12748433551920.

The previous prime is 20012220221197. The next prime is 20012220221251. The reversal of 20012220221211 is 11212202221002.

It is a happy number.

20012220221211 is a `hidden beast` number, since 2 + 0 + 0 + 12 + 220 + 221 + 211 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-20012220221211 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20012220221251) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 48971185 + ... + 49378146.

It is an arithmetic number, because the mean of its divisors is an integer number (1258084654944).

Almost surely, 2^{20012220221211} is an apocalyptic number.

20012220221211 is a deficient number, since it is larger than the sum of its proper divisors (10181811497445).

20012220221211 is a wasteful number, since it uses less digits than its factorization.

20012220221211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98350343 (or 98350340 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 20012220221211 its reverse (11212202221002), we get a palindrome (31224422442213).

The spelling of 20012220221211 in words is "twenty trillion, twelve billion, two hundred twenty million, two hundred twenty-one thousand, two hundred eleven".