1211123120019 has 16 divisors (see below), whose sum is σ = 1645464367872. Its totient is φ = 792101699168.

The previous prime is 1211123119993. The next prime is 1211123120029. The reversal of 1211123120019 is 9100213211121.

It is a cyclic number.

It is not a de Polignac number, because 1211123120019 - 2⁷ = 1211123119891 is a prime.

It is a super-2 number, since 2×1211123120019² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1211123120029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1229404 + ... + 1983350.

It is an arithmetic number, because the mean of its divisors is an integer number (102841522992).

Almost surely, 2^{1211123120019} is an apocalyptic number.

1211123120019 is a deficient number, since it is larger than the sum of its proper divisors (434341247853).

1211123120019 is a wasteful number, since it uses less digits than its factorization.

1211123120019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 764106.

The product of its (nonzero) digits is 216, while the sum is 24.

The spelling of 1211123120019 in words is "one trillion, two hundred eleven billion, one hundred twenty-three million, one hundred twenty thousand, nineteen".