1211319031121 has 16 divisors (see below), whose sum is σ = 1243423457280. Its totient is φ = 1179493821840.

The previous prime is 1211319031099. The next prime is 1211319031151. The reversal of 1211319031121 is 1211309131121.

It is a cyclic number.

It is not a de Polignac number, because 1211319031121 - 2⁶ = 1211319031057 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1211319031151) 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 in 15 ways as a sum of consecutive naturals, for example, 7188980 + ... + 7355546.

It is an arithmetic number, because the mean of its divisors is an integer number (77713966080).

Almost surely, 2^{1211319031121} is an apocalyptic number.

It is an amenable number.

1211319031121 is a deficient number, since it is larger than the sum of its proper divisors (32104426159).

1211319031121 is a wasteful number, since it uses less digits than its factorization.

1211319031121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167404.

The product of its (nonzero) digits is 324, while the sum is 26.

The spelling of 1211319031121 in words is "one trillion, two hundred eleven billion, three hundred nineteen million, thirty-one thousand, one hundred twenty-one".