1211200431269 has 2 divisors, whose sum is σ = 1211200431270. Its totient is φ = 1211200431268.

The previous prime is 1211200431211. The next prime is 1211200431361. The reversal of 1211200431269 is 9621340021121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1189109554369 + 22090876900 = 1090463^2 + 148630^2 .

It is a cyclic number.

It is not a de Polignac number, because 1211200431269 - 2²⁸ = 1210931995813 is a prime.

It is a super-2 number, since 2×1211200431269² (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 (1211200431169) 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 as a sum of consecutive naturals, namely, 605600215634 + 605600215635.

It is an arithmetic number, because the mean of its divisors is an integer number (605600215635).

Almost surely, 2^{1211200431269} is an apocalyptic number.

It is an amenable number.

1211200431269 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211200431269 is an equidigital number, since it uses as much as digits as its factorization.

1211200431269 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 32.

The spelling of 1211200431269 in words is "one trillion, two hundred eleven billion, two hundred million, four hundred thirty-one thousand, two hundred sixty-nine".