1211030971 has 2 divisors, whose sum is σ = 1211030972. Its totient is φ = 1211030970.

The previous prime is 1211030959. The next prime is 1211030993. The reversal of 1211030971 is 1790301121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1211030971 - 2²⁹ = 674160059 is a prime.

It is not a weakly prime, because it can be changed into another prime (1211030771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605515485 + 605515486.

It is an arithmetic number, because the mean of its divisors is an integer number (605515486).

Almost surely, 2^1211030971 is an apocalyptic number.

1211030971 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211030971 is an equidigital number, since it uses as much as digits as its factorization.

1211030971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 378, while the sum is 25.

The square root of 1211030971 is about 34799.8702727467. The cubic root of 1211030971 is about 1065.9047968581.

The spelling of 1211030971 in words is "one billion, two hundred eleven million, thirty thousand, nine hundred seventy-one".