1211430319949 has 2 divisors, whose sum is σ = 1211430319950. Its totient is φ = 1211430319948.

The previous prime is 1211430319919. The next prime is 1211430320033. The reversal of 1211430319949 is 9499130341121.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1096299043849 + 115131276100 = 1047043^2 + 339310^2 .

It is a cyclic number.

It is not a de Polignac number, because 1211430319949 - 2²⁴ = 1211413542733 is a prime.

It is a super-3 number, since 3×1211430319949³ (a number of 37 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1211430319919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605715159974 + 605715159975.

It is an arithmetic number, because the mean of its divisors is an integer number (605715159975).

Almost surely, 2^{1211430319949} is an apocalyptic number.

It is an amenable number.

1211430319949 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211430319949 is an equidigital number, since it uses as much as digits as its factorization.

1211430319949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 209952, while the sum is 47.

The spelling of 1211430319949 in words is "one trillion, two hundred eleven billion, four hundred thirty million, three hundred nineteen thousand, nine hundred forty-nine".