1211201879 has 2 divisors, whose sum is σ = 1211201880. Its totient is φ = 1211201878.

The previous prime is 1211201867. The next prime is 1211201917. The reversal of 1211201879 is 9781021121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1211201879 - 2¹² = 1211197783 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1211251879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605600939 + 605600940.

It is an arithmetic number, because the mean of its divisors is an integer number (605600940).

Almost surely, 2^1211201879 is an apocalyptic number.

1211201879 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211201879 is an equidigital number, since it uses as much as digits as its factorization.

1211201879 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 32.

The square root of 1211201879 is about 34802.3257699827. The cubic root of 1211201879 is about 1065.9549368056.

The spelling of 1211201879 in words is "one billion, two hundred eleven million, two hundred one thousand, eight hundred seventy-nine".