1125021211 has 2 divisors, whose sum is σ = 1125021212. Its totient is φ = 1125021210.

The previous prime is 1125021197. The next prime is 1125021253. The reversal of 1125021211 is 1121205211.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1125021211 - 2¹⁷ = 1124890139 is a prime.

It is not a weakly prime, because it can be changed into another prime (1125028211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 562510605 + 562510606.

It is an arithmetic number, because the mean of its divisors is an integer number (562510606).

Almost surely, 2^1125021211 is an apocalyptic number.

1125021211 is a deficient number, since it is larger than the sum of its proper divisors (1).

1125021211 is an equidigital number, since it uses as much as digits as its factorization.

1125021211 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40, while the sum is 16.

The square root of 1125021211 is about 33541.3358559256. The cubic root of 1125021211 is about 1040.0484478786.

Adding to 1125021211 its reverse (1121205211), we get a palindrome (2246226422).

The spelling of 1125021211 in words is "one billion, one hundred twenty-five million, twenty-one thousand, two hundred eleven".