1211012461 has 2 divisors, whose sum is σ = 1211012462. Its totient is φ = 1211012460.

The previous prime is 1211012441. The next prime is 1211012497. The reversal of 1211012461 is 1642101121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 782936361 + 428076100 = 27981^2 + 20690^2 .

It is a cyclic number.

It is not a de Polignac number, because 1211012461 - 2¹⁹ = 1210488173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1211012401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605506230 + 605506231.

It is an arithmetic number, because the mean of its divisors is an integer number (605506231).

Almost surely, 2^1211012461 is an apocalyptic number.

It is an amenable number.

1211012461 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211012461 is an equidigital number, since it uses as much as digits as its factorization.

1211012461 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 19.

The square root of 1211012461 is about 34799.6043224632. The cubic root of 1211012461 is about 1065.8993662240.

Adding to 1211012461 its reverse (1642101121), we get a palindrome (2853113582).

The spelling of 1211012461 in words is "one billion, two hundred eleven million, twelve thousand, four hundred sixty-one".