1211043049 has 2 divisors, whose sum is σ = 1211043050. Its totient is φ = 1211043048.

The previous prime is 1211043017. The next prime is 1211043079. The reversal of 1211043049 is 9403401121.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1173747600 + 37295449 = 34260^2 + 6107^2 .

It is a cyclic number.

It is not a de Polignac number, because 1211043049 - 2⁵ = 1211043017 is a prime.

It is not a weakly prime, because it can be changed into another prime (1211043079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605521524 + 605521525.

It is an arithmetic number, because the mean of its divisors is an integer number (605521525).

Almost surely, 2^1211043049 is an apocalyptic number.

It is an amenable number.

1211043049 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211043049 is an equidigital number, since it uses as much as digits as its factorization.

1211043049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 1211043049 is about 34800.0438074437. The cubic root of 1211043049 is about 1065.9083403830.

The spelling of 1211043049 in words is "one billion, two hundred eleven million, forty-three thousand, forty-nine".