1212041801 has 2 divisors, whose sum is σ = 1212041802. Its totient is φ = 1212041800.

The previous prime is 1212041767. The next prime is 1212041807. The reversal of 1212041801 is 1081402121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 720976201 + 491065600 = 26851^2 + 22160^2 .

It is a cyclic number.

It is not a de Polignac number, because 1212041801 - 2¹⁴ = 1212025417 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1212041807) 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, 606020900 + 606020901.

It is an arithmetic number, because the mean of its divisors is an integer number (606020901).

Almost surely, 2^1212041801 is an apocalyptic number.

It is an amenable number.

1212041801 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212041801 is an equidigital number, since it uses as much as digits as its factorization.

1212041801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128, while the sum is 20.

The square root of 1212041801 is about 34814.3907170584. The cubic root of 1212041801 is about 1066.2012794787.

Adding to 1212041801 its reverse (1081402121), we get a palindrome (2293443922).

The spelling of 1212041801 in words is "one billion, two hundred twelve million, forty-one thousand, eight hundred one".