1211151407 has 2 divisors, whose sum is σ = 1211151408. Its totient is φ = 1211151406.

The previous prime is 1211151397. The next prime is 1211151419. The reversal of 1211151407 is 7041511121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1211151407 - 2¹⁶ = 1211085871 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1211151497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605575703 + 605575704.

It is an arithmetic number, because the mean of its divisors is an integer number (605575704).

Almost surely, 2^1211151407 is an apocalyptic number.

1211151407 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211151407 is an equidigital number, since it uses as much as digits as its factorization.

1211151407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 280, while the sum is 23.

The square root of 1211151407 is about 34801.6006384764. The cubic root of 1211151407 is about 1065.9401301286.

Adding to 1211151407 its reverse (7041511121), we get a palindrome (8252662528).

The spelling of 1211151407 in words is "one billion, two hundred eleven million, one hundred fifty-one thousand, four hundred seven".