20012211211 has 8 divisors (see below), whose sum is σ = 20068844544. Its totient is φ = 19955655720.

The previous prime is 20012211203. The next prime is 20012211217. The reversal of 20012211211 is 11211221002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20012211211 - 2³ = 20012211203 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20012211191 and 20012211200.

It is not an unprimeable number, because it can be changed into a prime (20012211217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 516046 + ... + 553468.

It is an arithmetic number, because the mean of its divisors is an integer number (2508605568).

Almost surely, 2^20012211211 is an apocalyptic number.

20012211211 is a deficient number, since it is larger than the sum of its proper divisors (56633333).

20012211211 is an equidigital number, since it uses as much as digits as its factorization.

20012211211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38921.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 20012211211 its reverse (11211221002), we get a palindrome (31223432213).

The spelling of 20012211211 in words is "twenty billion, twelve million, two hundred eleven thousand, two hundred eleven".