1211122201019 has 2 divisors, whose sum is σ = 1211122201020. Its totient is φ = 1211122201018.

The previous prime is 1211122200863. The next prime is 1211122201031. The reversal of 1211122201019 is 9101022211121.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1211122201019 - 2²⁰ = 1211121152443 is a prime.

It is a super-2 number, since 2×1211122201019² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1211122200985 and 1211122201003.

It is not a weakly prime, because it can be changed into another prime (1211122201819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605561100509 + 605561100510.

It is an arithmetic number, because the mean of its divisors is an integer number (605561100510).

Almost surely, 2^{1211122201019} is an apocalyptic number.

1211122201019 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211122201019 is an equidigital number, since it uses as much as digits as its factorization.

1211122201019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 23.

It can be divided in two parts, 1211122 and 201019, that added together give a palindrome (1412141).

The spelling of 1211122201019 in words is "one trillion, two hundred eleven billion, one hundred twenty-two million, two hundred one thousand, nineteen".