1211012807 has 2 divisors, whose sum is σ = 1211012808. Its totient is φ = 1211012806.

The previous prime is 1211012797. The next prime is 1211012821. The reversal of 1211012807 is 7082101121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1211012807 - 2¹⁶ = 1210947271 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1211012107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605506403 + 605506404.

It is an arithmetic number, because the mean of its divisors is an integer number (605506404).

Almost surely, 2^1211012807 is an apocalyptic number.

1211012807 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211012807 is an equidigital number, since it uses as much as digits as its factorization.

1211012807 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 224, while the sum is 23.

The square root of 1211012807 is about 34799.6092937837. The cubic root of 1211012807 is about 1065.8994677371.

Adding to 1211012807 its reverse (7082101121), we get a palindrome (8293113928).

The spelling of 1211012807 in words is "one billion, two hundred eleven million, twelve thousand, eight hundred seven".