122220021211 has 2 divisors, whose sum is σ = 122220021212. Its totient is φ = 122220021210.

The previous prime is 122220021071. The next prime is 122220021257. The reversal of 122220021211 is 112120022221.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122220021211 is a prime.

It is not a weakly prime, because it can be changed into another prime (122220021271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61110010605 + 61110010606.

It is an arithmetic number, because the mean of its divisors is an integer number (61110010606).

Almost surely, 2^122220021211 is an apocalyptic number.

122220021211 is a deficient number, since it is larger than the sum of its proper divisors (1).

122220021211 is an equidigital number, since it uses as much as digits as its factorization.

122220021211 is an evil number, because the sum of its binary digits is even.

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

Adding to 122220021211 its reverse (112120022221), we get a palindrome (234340043432).

The spelling of 122220021211 in words is "one hundred twenty-two billion, two hundred twenty million, twenty-one thousand, two hundred eleven".