1211200026019 has 2 divisors, whose sum is σ = 1211200026020. Its totient is φ = 1211200026018.

The previous prime is 1211200025911. The next prime is 1211200026037. The reversal of 1211200026019 is 9106200021121.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1211200026019 - 2⁷ = 1211200025891 is a prime.

It is a super-2 number, since 2×1211200026019² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1211200025984 and 1211200026002.

It is not a weakly prime, because it can be changed into another prime (1211200026119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605600013009 + 605600013010.

It is an arithmetic number, because the mean of its divisors is an integer number (605600013010).

Almost surely, 2^{1211200026019} is an apocalyptic number.

1211200026019 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211200026019 is an equidigital number, since it uses as much as digits as its factorization.

1211200026019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 25.

The spelling of 1211200026019 in words is "one trillion, two hundred eleven billion, two hundred million, twenty-six thousand, nineteen".