1211102091919 has 2 divisors, whose sum is σ = 1211102091920. Its totient is φ = 1211102091918.

The previous prime is 1211102091827. The next prime is 1211102091923. The reversal of 1211102091919 is 9191902011121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1211102091919 - 2²⁵ = 1211068537487 is a prime.

It is a super-2 number, since 2×1211102091919² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1211102098919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605551045959 + 605551045960.

It is an arithmetic number, because the mean of its divisors is an integer number (605551045960).

Almost surely, 2^{1211102091919} is an apocalyptic number.

1211102091919 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211102091919 is an equidigital number, since it uses as much as digits as its factorization.

1211102091919 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2916, while the sum is 37.

The spelling of 1211102091919 in words is "one trillion, two hundred eleven billion, one hundred two million, ninety-one thousand, nine hundred nineteen".