211011221222129 has 2 divisors, whose sum is σ = 211011221222130. Its totient is φ = 211011221222128.

The previous prime is 211011221222093. The next prime is 211011221222233. The reversal of 211011221222129 is 921222122110112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 193028091837025 + 17983129385104 = 13893455^2 + 4240652^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211011221222129 is a prime.

It is not a weakly prime, because it can be changed into another prime (211011221222929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105505610611064 + 105505610611065.

It is an arithmetic number, because the mean of its divisors is an integer number (105505610611065).

Almost surely, 2^{211011221222129} is an apocalyptic number.

It is an amenable number.

211011221222129 is a deficient number, since it is larger than the sum of its proper divisors (1).

211011221222129 is an equidigital number, since it uses as much as digits as its factorization.

211011221222129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 29.

The spelling of 211011221222129 in words is "two hundred eleven trillion, eleven billion, two hundred twenty-one million, two hundred twenty-two thousand, one hundred twenty-nine".