1211111320973 has 2 divisors, whose sum is σ = 1211111320974. Its totient is φ = 1211111320972.

The previous prime is 1211111320961. The next prime is 1211111321003. The reversal of 1211111320973 is 3790231111121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1067165443369 + 143945877604 = 1033037^2 + 379402^2 .

It is a cyclic number.

It is not a de Polignac number, because 1211111320973 - 2¹⁶ = 1211111255437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1211111323973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605555660486 + 605555660487.

It is an arithmetic number, because the mean of its divisors is an integer number (605555660487).

Almost surely, 2^{1211111320973} is an apocalyptic number.

It is an amenable number.

1211111320973 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211111320973 is an equidigital number, since it uses as much as digits as its factorization.

1211111320973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2268, while the sum is 32.

The spelling of 1211111320973 in words is "one trillion, two hundred eleven billion, one hundred eleven million, three hundred twenty thousand, nine hundred seventy-three".