220021231211 has 2 divisors, whose sum is σ = 220021231212. Its totient is φ = 220021231210.

The previous prime is 220021231207. The next prime is 220021231279. The reversal of 220021231211 is 112132120022.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 220021231211 - 2² = 220021231207 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 220021231211.

It is not a weakly prime, because it can be changed into another prime (220021231411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110010615605 + 110010615606.

It is an arithmetic number, because the mean of its divisors is an integer number (110010615606).

Almost surely, 2^220021231211 is an apocalyptic number.

220021231211 is a deficient number, since it is larger than the sum of its proper divisors (1).

220021231211 is an equidigital number, since it uses as much as digits as its factorization.

220021231211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 220021231211 its reverse (112132120022), we get a palindrome (332153351233).

The spelling of 220021231211 in words is "two hundred twenty billion, twenty-one million, two hundred thirty-one thousand, two hundred eleven".