1211001022229 has 2 divisors, whose sum is σ = 1211001022230. Its totient is φ = 1211001022228.

The previous prime is 1211001022159. The next prime is 1211001022277. The reversal of 1211001022229 is 9222201001121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1199029380004 + 11971642225 = 1095002^2 + 109415^2 .

It is a cyclic number.

It is not a de Polignac number, because 1211001022229 - 2¹² = 1211001018133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1211001024229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605500511114 + 605500511115.

It is an arithmetic number, because the mean of its divisors is an integer number (605500511115).

Almost surely, 2^{1211001022229} is an apocalyptic number.

It is an amenable number.

1211001022229 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211001022229 is an equidigital number, since it uses as much as digits as its factorization.

1211001022229 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 23.

The spelling of 1211001022229 in words is "one trillion, two hundred eleven billion, one million, twenty-two thousand, two hundred twenty-nine".