1200122212181 has 2 divisors, whose sum is σ = 1200122212182. Its totient is φ = 1200122212180.

The previous prime is 1200122212169. The next prime is 1200122212217. The reversal of 1200122212181 is 1812122210021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 907511537956 + 292610674225 = 952634^2 + 540935^2 .

It is a cyclic number.

It is not a de Polignac number, because 1200122212181 - 2⁶ = 1200122212117 is a prime.

It is a super-2 number, since 2×1200122212181² (a number of 25 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1200122212381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600061106090 + 600061106091.

It is an arithmetic number, because the mean of its divisors is an integer number (600061106091).

Almost surely, 2^{1200122212181} is an apocalyptic number.

It is an amenable number.

1200122212181 is a deficient number, since it is larger than the sum of its proper divisors (1).

1200122212181 is an equidigital number, since it uses as much as digits as its factorization.

1200122212181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 256, while the sum is 23.

The spelling of 1200122212181 in words is "one trillion, two hundred billion, one hundred twenty-two million, two hundred twelve thousand, one hundred eighty-one".